Single Footing Designihab Dyab

Design Single Footing

ONLY CELLS IN WHITE ARE ACCESSABLE (CHANGEABLE)

Material Propertiesf`c 240 kg\cm2fy 4200 kg\cm2

Dimensions of Columnb 0.3 mt 0.6 m

Service Loadsdead 50 tonlive 20 ton

Factors of DesignF.S 1 saftey factor <- optional F.D 1.20 ult. dead factor

F.L 1.60 ult. live factor

Design LoadPd 70 ton

Allowable Bearing CapacityB.C 32 ton\m2

Minimum Footing AreaA = 2.19 m2

Minimum DimensionsB 1.34 mL 1.64 m

Select Design Dimensions B 1.35 mL 1.65 m

Area 2.23 m2 <- Area is Ok

for Square & rectanular, No eccentric...Contact Me

Eng Ehab Diab

B11

EHAB: compressive strength of concrete

B12

EHAB: yeild strength of steel

B13

EHAB: from the figure beside..

B16

EHAB: the values of the unfactored(service) load that act on footing

B19

EHAB: factor design for both live and dead in addition to the sfaty factor , it is optional , keep it (1) if negligable.

B20

EHAB: optional safety factor . Not less than 1

B21

EHAB: ultimaity factor for dead load

B22

EHAB: ultimaty factor for live load.

B23

EHAB: the design load or the service load multiplied with the factor of safty, it is not the ultimate load.

B27

EHAB: the minimum area of footing which claculated by dividung the service load on bearing capacity

B29

EHAB: the minimum dimensions calculated by the program, you have to select your dimensions.

B32

EHAB: select your dimensions that will be considered in the calculation.

Ultimate Bearing Capacityqu 41.30 ton\m2

Select Depth (m) <- Hint : try a depth not less thand 0.27 m Safe

cover 0.08 m

Check for Punching ShearPp 71.52 ton

øvcp 95.77 ton

Design for Flexure (Moment)

Reinforcement in "L" Side Reinforcement in "B" SideMu 5.69 ton.m Muρ 0.0021 ρ

As 5.69 As

As(min) 6.3 >>> As(min)

As (used) 6.30 As (used)

ø 14 mm ø# of bars 5 \m 1.54 # of barsspace(s1) 24.42 cm 4.09 space (s2)

spaces 24.4224.00

81012141618 1485590.90909 1485590.90909091

cm2

cm2

cm2

B36

EHAB: ultimate bearing capacity calculated considering the factors of load that user define.

B38

EHAB: select a depth so that greater than the given one.

B42

EHAB: Punching force act on footing.

B43

EHAB: Shear resistance of footing againts punching.. = 0.53 * sqrt (fc) * b* d

B49

EHAB: minmum area of steel is the shrinkage area .. = .0018*b*d

F49

EHAB: minmum area of steel is the shrinkage area .. = .0018*b*d

20 17496000 1749600022 0.08491031716 0.0849103171634 inside sqrt2532

50 24.42 24.00

24 2424 24


ONLY CELLS IN WHITE ARE ACCESSABLE (CHANGEABLE)

0.450.50

0.2025

2.21

2.2275

L 0.21B 0.21

for Square & rectanular, No eccentric...

b

t

L

special thanks to Dr.Ibrahim Erman

try a depth not less than 0.21 from wide beam shearConsidering ( L ) is more critical

Design for Flexure (Moment)

Reinforcement in "B" Side5.69 ton.m

0.00215.69

6.3

6.3014 mm 1.5386 area of bar5 \m 4.0946 # of bars

24.42 cm

edge view

cm2

cm2

cm2

H= 0.35 m

L = 1.65 m

5 ø 14 \mS2 = 24.42

illustrative view (not scaled)


x

0.5183

B

Ultimate Design MethodACI code 2008

S1 = 24.42B = 1.35 m

5 ø 14 \m

illustrative view (not scaled)





































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































An-Njah National University

Engineering CollegeCivil Engineering Dept.

Eng. Ehab Diab

JENIN-PALESTINE

Jawwal: 0599 886 816Wataniya: 0569 886 816

Email

[email protected][email protected]

mailto:[email protected]

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Documents

Single Footing Designihab Dyab