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Structural Engineering Review Course Foundations and Retaining Structures

copy 2016 Professional Publications Inc 1

STRC copy2015 Professional Publications Inc

Structural Engineering Review Course

Foundations and

Retaining Structures






Foundations and Retaining Structures

Lesson Overview

Foundations

and

Retaining

Structures

bull Strip Footing

bull Isolated Column with Square Footing

bull Isolated Column with Rectangular Footing

bull Combined Footing

bull Strap Footing

bull Cantilever Retaining Wall

bull Counterfort Retaining Wall

2







Learning Objectives

You

will

learnbull strip square rectangular combined

and strap footing design for flexure

and shear

bull cantilever and counterfort retaining

wall design

bull how to deal with iterative procedures

on the SE exam

3







Prerequisite Knowledge

You

should

already

be

familiar

withbull statics

bull mechanics of materials

bull structural analysis

bull basic reinforced concrete design

bull basic foundation terminology

4







Referenced Codes and Standards

bull

Building

Code

Requirements

for

Structural

Concrete (ACI 318

2011)

bull International Building Code (IBC 2012)

5







Strip Footing

B length of footing parallel to wall

e eccentricity of wall load with respect

to the centroid of the footing

e´ eccentricity of wall load with respect

to edge of footing L2 ndash e

L length of footing perpendicular

to wall

P applied wall load

q soil pressure due to unfactored loads

nomenclature

6







Strip Footing

pressure

distributionbull unfactored loads

bull self ‐weight of footing

bull applied load from wall

bull For footing with length B (parallel to

wall) pressure distribution is as shown

on next slide

bull Size footing so that maximum soil

pressure is less than allowable soil pressure

7







Strip FootingFigure 21 Net Pressure Distribution on a Footing

8







Example Strip FootingExample

21

9







Example Strip Footing

10








11







Strip Footing

factored soil pressure

bull factored loads

bull force acting on footing (net pressure)

bull Self ‐weight of footing produces equal

and opposite soil pressure (cancels out and is not included in net pressure)

bull soil pressure due to applied wall load

only

bull

used to

determine

flexure

and

flexure

shear

12








For the strip footing shown the applied

loads PD and PL include the weight of the

wall Determine the maximum factored

net pressure

13








12 16

kips kips12 20 16 10

ft ft

40 kips ft

40 ft-kips ftft-kips

40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14







Strip Footing Critical Sections

c width of wall

d effective depth of footing

h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing

flexure shear design

same as for reinforced concrete beams per ACI 318 Sec 112

flexure design

same as for reinforced concrete beams per ACI 318 Sec 102 with exceptions

bull ρmin = 00018 [for grade 60 bars]

bull main reinforcement smax ge max [18 in 3h]

bull main reinforcement Oslash development length le anchorage length

bull distributed reinforcement smax ge max [18 in 5h]

17

l d d








23

18

St t l E i i R i C F d ti d R t i i St t








19









20









21








Isolated Column with Square Footing

reinforcement details

bull maximum spacing

bull principal reinforcement

s = 3h le 18 in

bull distribution reinforcement

s = 5h le 18 in

bull minimum clear spacing between

parallel bars in a layer

bull minimum reinforcement ratio for

distribution steel

22









reinforcement details (continued)

minimum cover

bull cast against earth = 3 in

bull exposed to earth or weather

bull 15 in for bars le no 5

bull 2 in for bars gt no 5

23




g g g




Poll Isolated Column with Square Footing

Which of the following is true about the

reinforcement detailing requirements of

concrete beams and footings

(A) The maximum spacing of

reinforcement for concrete beams is

smaller than for footings

(B) The minimum cover for footings is less

than that of reinforced concrete beams

24
















Solution

Detailing requirements are different for

beams and footings More space is

allowed between reinforcement for

footings so option A is true More cover

is needed for footings than beams so

option B is false

The answer is (A)

25








bo length of the critical perimeter

β ratio of long side to short side

of column

s shear constant

nomenclature

26







Isolated Column with Square FootingFigure 23 Critical Perimeter

for

Punching

Shear

27








design for punching shear (continued)

bull shear strength

bull for square columns

bull when β gt 2

bull for bo gt 20d

bull where ACI Eq 11‐33

ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress

bull axial and moment

bull max shear stress

29







Example Isolated Column with Square Footing

Example 24

30








31








design for flexure shear and flexure

bull critical section

bull concrete and masonry (same as

strip footing)

bull steel (as shown)

bull capacity (same as strip footing)

Figure 24 Critical Sections for a Footing with Steel Base Plate

32







Example Isolated Column with Square FootingExample

25

33










Figure 25

Bearing

on

Footing

Concrete

35








transfer of force at base of column

bull bearing capacity of the column

concree

bull

bearing

capacity

of

the

footing

concrete

bull Bearing capacity is governed by the

lesser of the two equations

bull A2 is the area at the base of the column

where the lines intersect (See Fig 25)

bull This area may be governed by the

length of the footing

bull Instead of c + 4d the length is B

36











Example Isolated Column with Square FootingCSCO Example

68

39

















Example Isolated Column with Rectangular Footing

45








46









Combined Footing

pressure distribution

bull Design footing based on factored

loads (Do not include footing weight)

bull Design as a beam continuous over two

supports

bull max negative moment at 0 shear

location

bull max positive moment at column

no 2 outside face

bull reinforcement required in band

under column no 1

48









Example Combined FootingExample

29

50









Example Combined Footing

52










210

54








55








56








57









Combined Footing

design for flexure

bull similar to isolated column footing

method

bull footing design for factored loads

bull reinforcement required in band under

column no 1

Figure 28 Combined Footing with Applied Factored Loads

59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing


bull two pad footings connected by strap

bull soil pressure under strap negligible

bull strap and pads form rigid body

bull size footings for uniform pressure

under pads

bull adjust pad sizes for equal pressure

under both pads

Figure 29 Strap Footing with Applied Service Loads

65








Foundations

and

Retaining

Structures

Strap Footing

pressure distribution (continued)

bull align footing 2 so that R2 is below p2

bull sum vertical forces and solve for R2

bull take moments about footing 2 and

solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing


To design a strap footing with equal soil

pressure also consider the weight of

strap beam

You should

bull estimate R1 and solve for A1 and W 1

bull estimate R2 the solve for A2 and W 2

bull substitute values into equilibrium

equations and iterate the process to

convergence

68






Foundations

and

Retaining

Structures

Example Strap FootingExample 213

69






Foundations

and

Retaining

Structures

Example Strap Footing

70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72

An afternoon (depth) problem contains

iterative steps

such

as

how

to

design

a

strap footing

Through how many iterations should

you go

(A) 1

(B) 3

(C) as many as it takes to reach an exact

solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution

Demonstrate that you understand the

procedure and then move on

The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing

design of strap beam for shear

bull factored loads

bull summing moments about pad no 2

bull summing vertical forces

bull shear at left and right end of strap

74






Foundations

and

Retaining

Structures

Strap FootingFigure 210 Factored Forces on Strap Footing

75






Foundations

and

Retaining

Structures

Strap Footing

design of strap beam for flexure

factored moments

bull left end of strap

bull right end of strap

76






Foundations

and

Retaining

Structures

Cantilever Retaining Wall

w live load surcharge

W B weight of base

W k weight of key

W L weight of surcharge

W S weight of backfillW w weight of stem

h B depth of base

h K height of shear key

hT total height of retaining wall

hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem

H A resultant of active earth pressure

H L resultant of pressure due to live

load surcharge

nomenclature

77






Foundations

and

Retaining

Structures


H P resultant of passive earth pressure

p A active pressure

p L pressure from live load surcharge

p p passive pressure

q earth pressure under baseγ s density of soil

nomenclature

φ angle of internal friction (of soil)

μ friction coefficient

sumW total weight of retaining wall and

backfill and live load surcharge

symbols

78






Foundations

and

Retaining

Structures

Cantilever Retaining WallFigure 211 Cantilever Retaining Wall with Applied Service Loads

79






Foundations

and

Retaining

Structures



bull as shown in Fig 211

bull resultant of active earth pressure

(Rankine)

bull resultant of live load surcharge

alternatively represented by

equivalent height of fill

80






Foundations

and

Retaining

Structures



bull resultant of passive earth pressure

bull friction beneath base

bull required factors of safety

bull sliding

bull overturning

(A factor of safety of 15 is

required for overturning about

the toe)

81






Foundations

and

Retaining

Structures

Example Cantilever Retaining WallExample 216

82






Foundations

and

Retaining

Structures

Example Cantilever Retaining Wall

83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures



bull minimum reinforcement in stem walls

bull bars greater than no 5

bull

bars no

5 and

smaller

bull Walls greater than 10 in thick require

two layers of horizontal

reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures



bull vertical reinforcement in earth face (governed by flexure)

bull vertical reinforcement in air face

(supply enough so that earth face plus

air face is ρ 00018)

bull vertical and horizontal reinforcement

spacing (not more than 3 times wall

thickness or 18 in)

88


F d ti d R t i i St t





Foundations

and

Retaining

Structures


Assuming no 5 bars what is the

minimum required reinforcement

spacing for an 8 in thick wall

89



SCL10





Foundations

and

Retaining

Structures


Solution

For no 5 bars ρminvert = 00033

and ρminhor = 0002

For no 5 bars at 18 in (maximum spacing) As = 0207 insup2ft

Therefore use no 5 at 18 in for both

directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90

SCL10 Updated rho(min vert) to 00033 and updated calculation OKSierra Cirimelli-Low 6252015









Foundations

and

Retaining

Structures


design for shear and flexure

bull Recalculate soil pressure using factored loads

bull locations of critical section

bull flexure in stem located at base of the stem

bull flexure in toe located at front face of stem

bull flexure in heel located at rear face of stem

91







Foundations

and

Retaining

Structures

Counterfort Retaining Wall

design of stem and base

For 05 l nl c 10

bull design stem for pressure value at

bull horizontal span moments

bull at counterfort supports

bull at between counterforts

bull cantilever moment at base

06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures


l n clear span between counterfortsl c clear height of counterfort

nomenclature

93









Foundations

and

Retaining

Structures

Example Counterfort Retaining WallExample

218

95







Foundations

and

Retaining

Structures

Example Counterfort Retaining Wall

96









g

Counterfort Retaining WallFigure 212 Details of Counterfort Retaining Wall

98







g

Example Counterfort Retaining WallExample 219

99










101







Lesson Overview


bull

Strip Footing


bull Isolated Column with Rectangular

Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design

bull retaining wall design

bull how to avoid pitfalls on the SE exam

bull tricks to increase problem solving

speed during the exam

103







Lesson Overview

Foundations

and

Retaining

Structures

bull Strip Footing


bull Isolated Column with Rectangular Footing


bull Strap Footing



2







Learning Objectives

You

will



and shear


wall design


on the SE exam

3








You

should

already

be

familiar

withbull statics





4








bull

Building

Code

Requirements

for

Structural

Concrete (ACI 318

2011)


5







Strip Footing







to wall

P applied wall load


nomenclature

6







Strip Footing

pressure






on next slide



7








8








21

9








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







Learning Objectives

You

will



and shear


wall design


on the SE exam

3








You

should

already

be

familiar

withbull statics





4








bull

Building

Code

Requirements

for

Structural

Concrete (ACI 318

2011)


5







Strip Footing







to wall

P applied wall load


nomenclature

6







Strip Footing

pressure






on next slide



7








8








21

9








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








You

should

already

be

familiar

withbull statics





4








bull

Building

Code

Requirements

for

Structural

Concrete (ACI 318

2011)


5







Strip Footing







to wall

P applied wall load


nomenclature

6







Strip Footing

pressure






on next slide



7








8








21

9








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








bull

Building

Code

Requirements

for

Structural

Concrete (ACI 318

2011)


5







Strip Footing







to wall

P applied wall load


nomenclature

6







Strip Footing

pressure






on next slide



7








8








21

9








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







Strip Footing







to wall

P applied wall load


nomenclature

6







Strip Footing

pressure






on next slide



7








8








21

9








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







Strip Footing

pressure






on next slide



7








8








21

9








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








8








21

9








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








21

9








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








10








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








11







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







Strip Footing


bull factored loads





only

bull

used to

determine

flexure

and

flexure

shear

12











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103











net pressure

13








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








12 16


ft ft

40 kips ft


40ft 1 ft

kips40

ft

u D L

u

P P P

M

M e

P

2

61

6 1kips40 1

ft 12 ft

1 ft 12 ft

5 kips ft max

e P

Lq BL

12 ft2 ft6 6

L

6

Le Since

14








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








c width of wall


h depth of footing

nomenclature

15








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








Figure 22

Critical

Sections

for

Flexure

and

Shear

16







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







Strip Footing



flexure design






17

l d d








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








23

18









19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








19









20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








20









21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








21












s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103











s = 3h le 18 in


s = 5h le 18 in




distribution steel

22










minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103









minimum cover





23




g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103



g g g













24
















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103















Solution






option B is false

The answer is (A)

25










of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103









of column

s shear constant

nomenclature

26








for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







for

Punching

Shear

27









bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








bull shear strength


bull when β gt 2

bull for bo gt 20d


ACI Eq 11‐31

ACI Eq 11‐32

28








design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







design shear

axial load only

bull shear force

bull shear stress



29








Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







Example 24

30








31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







31











strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103










strip footing)




32








25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







25

33










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103










Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







Figure 25

Bearing

on

Footing

Concrete

35










concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103









concree

bull

bearing

capacity

of

the

footing

concrete








36












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103












68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103










68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







68

39


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103


















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103
















45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103














45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103












45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103










45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







45








46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







46









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103









Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103






Combined Footing





supports


location


no 2 outside face


under column no 1

48










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103










29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







29

50










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103










52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







52










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103










210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







210

54








55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







55








56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







56








57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







57









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103









Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103






Combined Footing

design for flexure


method



column no 1


59








212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







212

60








61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







61








62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







62








63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103







63








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures

Strap Footing






under pads


under both pads


65








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures

Strap Footing





solve for R1

67






Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures

Strap Footing




strap beam

You should





convergence

68






Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


69






Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


70






Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


71






Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures

Poll Strap Footing

72


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution






Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures

Poll Strap Footing

Solution



The answer is (A)


iterative steps

such

as

how

to

design

a

strap footing


you go

(A) 1

(B) 3


solution

73






Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures

Strap Footing


bull factored loads




74






Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


75






Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures

Strap Footing


factored moments



76






Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures



W B weight of base

W k weight of key



h B depth of base



hw stem thickness

L B length of base

L H length of heel

LT length of toe

Lw Length of stem



load surcharge

nomenclature

77






Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures



p A active pressure




nomenclature





symbols

78






Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


79






Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures





(Rankine)




80






Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures






bull sliding

bull overturning



the toe)

81






Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


82






Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


83








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103








Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


85




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103




d d





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures





bull

bars no

5 and

smaller



reinforcement

87

vert

hor

033

020

vert

hor

033

025


F d i d R i i S





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures









thickness or 18 in)

88







Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures





89



SCL10





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


Solution


and ρminhor = 0002



directions

2

min

2

2vert

2

2hor

8 in 12 in 96 in ft

in00012 96 03168 in ftft

in0002 96 0192 in ft

ft

g A

A

90

SCL10

Slide 90










Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103









Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures








91







Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures



For 05 l nl c 10






06c

l

2

11

nql

2

16

nql

30035 A c

l

92







Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures



nomenclature

93









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103









Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


218

95







Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Foundations

and

Retaining

Structures


96









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103









g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





g


98







g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





g


99










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103










101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103






101







Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Lesson Overview


bull

Strip Footing



Footing


bull Strap Footing



102


Foundations

and

Retaining

Structures

b





Learning Objectives

You have learned

bull

footing design





103





Learning Objectives

You have learned

bull

footing design





103