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REINFORCED CONCRETE WOR

Areas of Reinforcement

Links in Beams

Ultimate Anchorage and Laps

Spacing of Longitudinal Bars

CONTENTS

Bends and Hooks

Minimum and Maximum Reinforce

Notes

About

Mesh Reinforcement

2000 Chris Buczkowski

THIS IS AN UN

Anchorage bond stress design

Minimum radius of bends

ColumnsBeamsSlabsWalls

FOR MICROSOFT EXCEL

Other spreadsheets:BAR SCHEDULE FOR EXCEL 97

Bar Schedule for Excel 97 is a spreadsheet for the schedulingof steel for the reinforcement of concrete. The spreadsheet hasbeen developed to comply with BS 4466 : 1989 andAmendment No. 1 published 28 February 1990.

The aim of the spreadsheet is to reduce the time taken toproduce a bar schedule, reduce arithmetical errors, reducescheduling errors, increase compliance with the BSI specifiedformat for bar scheduling and, eventually, become the basis forelectronic data interchange.

The latest version of Bar Schedule may be downloaded from :http://www.structural-engineering.fsnet.co.uk

Other spreadsheets:WIND DESIGN WORKBOOKThis spreadsheet implements the full Standard Method ofcalculating wind loads for buildings in accordance with BS 6399: Part 2 : 1997. This method is suitable for buildings up to 100mhigh. The workbook contains spreadsheets which can beprinted as complete calculation pages. It also containsspreadsheets which can be used as design aids, useful forhand calculations or checking designs. For Engineers new tothe code, the spreadsheet can prove an invaluable teaching aid.

Registration details

FREE SPREINFOR

An interactive sheet for detc

ISSA must for every offi

document/drawing issue syour co

The latest versionshttp://www.structur

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The latest version of Wind Design Workbook may bedownloaded from :http://www.structural-engineering.fsnet.co.uk

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BOOK

ent

EGISTERED COPY

Version 1.0

Click on a item

EADSHEETS !!EMENT AREASrmining areas of reinforcement for

oncrete.

E SHEETe, a simple but presentableheet that can be customised with

pany's name.may be downloaded from :al-engineering.fsnet.co.uk

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Steel Reinforcement Areas

Cross sectional area of number of bars (mm)

1 2 3 4 5 6 7 8 9

6 28 57 85 113 141 170 198 226 254

8 50 101 151 201 251 302 352 402 452

10 79 157 236 314 393 471 550 628 707

12 113 226 339 452 565 679 792 905 1018

16 201 402 603 804 1005 1206 1407 1608 1810

20 314 628 942 1257 1571 1885 2199 2513 2827

25 491 982 1473 1963 2454 2945 3436 3927 4418

32 804 1608 2413 3217 4021 4825 5630 6434 7238

40 1257 2513 3770 5027 6283 7540 8796 10053 11310

50 1963 3927 5890 7854 9817 11781 13744 15708 17671

Cross sectional area of bars per metre (mm/m)

50 75 100 125 150 175 200 225 250

6 565 377 283 226 188 162 141 126 113

8 1005 670 503 402 335 287 251 223 201

10 1571 1047 785 628 524 449 393 349 314

12 2262 1508 1131 905 754 646 565 503 452

16 4021 2681 2011 1608 1340 1149 1005 894 804

20 6283 4189 3142 2513 2094 1795 1571 1396 1257

25 9817 6545 4909 3927 3272 2805 2454 2182 1963

32 10723 8042 6434 5362 4596 4021 3574 3217

40 12566 10053 8378 7181 6283 5585 5027

50 19635 15708 13090 11220 9817 8727 7854

Cross sectional area of bars in pairs per metre (mm/m)

50 75 100 125 150 175 200 225 250

6 1131 754 565 452 377 323 283 251 226

8 2011 1340 1005 804 670 574 503 447 402

Bar Size

(mm)

Bar Spacing (mm)

Bar Size

(mm)

Number of Bars

Bar Size

(mm)

Bar Spacing (mm)

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10 3142 2094 1571 1257 1047 898 785 698 628

12 4524 3016 2262 1810 1508 1293 1131 1005 905

16 5362 4021 3217 2681 2298 2011 1787 1608

20 8378 6283 5027 4189 3590 3142 2793 2513

25 9817 7854 6545 5610 4909 4363 3927

32 12868 10723 9191 8042 7149 6434

40 16755 14362 12566 11170 10053

16

121396 12576283 4189 3142 2513 2094 1795 1571

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0

10 11 12

283 311 339

503 553 603

785 864 942

1131 1244 1357

2011 2212 2413

3142 3456 3770

4909 5400 5890

8042 8847 9651

12566 13823 15080

19635 21598 23562

2000

275 300 400

103 94 71

183 168 126

286 262 196

411 377 283

731 670 503

1142 1047 785

1785 1636 1227

2925 2681 2011

4570 4189 3142

7140 6545 4909

1200

275 300 400

206 188 141

366 335 251

Enter area (mm):

Enter area (mm):

Enter area (mm):

Home

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571 524 393

823 754 565

1462 1340 1005

2285 2094 1571

3570 3272 2454

5849 5362 4021

9139 8378 6283

1142 1047 785

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Spacing of Longitudinal Bars

Maximum distance between bars in tension

Slabs -y h

y gm % red b N/mm (mm)

N/mm steel +/- 460 200

Beams 460 1.05 0 1 152 no

Slabs 460 1.05 0 1 484

cl 3.12.11.2.4 Clear distance between bars in tension

As req As prov y gm % red b s

mm mm N/mm steel +/- N/mm

300 300 250 1.15 0 1 156 300

Minimum clear distance between bars

mm mm

bar size 25 bar size 16

aggregate size 20 aggregate size 20

spacer bar size 14 minimum distance 25

Minimum distance between

vertically spaced bars

Minimum distance between

horizontally spaced bars

clear

distance

Clear horizontal distance between bars accordingto % redistribution (mm)

Table3.28

clear

distance

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Clear spacing between barsd As 100As/bd

(mm) (mm/m)

175 550 0.31 525

further check required!

clear

distance

Note: For slabs, if % redistributionis not known, use 15% for supportsand 0% for spans.

Home

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Reinforcement Links in Beams

General Use

bv d yv m

mm mm N/mm steel

400 500 250 1.05

bar size Asv sv

mm mm mm bv

10 2 157 225 mm

375 400

Link reinforcement in beams, Asv/sv (mm/mm) 2

Spacing of Links (mm)

50 75 100 125 150 175 200 225 250

6 1.13 0.75 0.57 0.45 0.38 0.32 0.28 0.25 0.23

8 2.01 1.34 1.01 0.80 0.67 0.57 0.50 0.45 0.40

10 3.14 2.09 1.57 1.26 1.05 0.90 0.79 0.70 0.63

12 4.52 3.02 2.26 1.81 1.51 1.29 1.13 1.01 0.90

16 8.04 5.36 4.02 3.22 2.68 2.30 2.01 1.79 1.61

400

350

30

10

3

165

Special Situations

Laps with limited cover

NO

bar sizes (mm) bar sizes (mm)

smallest largest link smallest link

16 25 7 190 25 32 8 200

side cover (mm)

link bar size (mm)

max

spacing

cover

(mm)

max

spacing

Minimum links forcompression reinforcement

compression reinforcement ?

Are both lapped bars

greater than 20mm ?NO

Lateral spacing of equally

s aced le s

effective depth, d (mm)

Minim

Minimum shear links in beams

no. of

legs

max sv = 0.75d

Leg spacing OK

beam breadth, bv (mm)

no. of legs

leg spacing (mm)

Bar Size(mm)

no. of legs =

Asv=Total area of legs (mm)sv=Spacing of links (mm)

Lateral spacing of legsNo tension bar to be more thaEach alternate compression bNo compression bar to be furtrestrained bar.

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yv m Asv/sv

N/mm steel

250 1.05 0.67

0.74

275 300 400

0.21 0.19 0.14

0.37 0.34 0.25

0.57 0.52 0.39

0.82 0.75 0.57

1.46 1.34 1.01

Enter Asv/sv :

um shear links, Asv/sv

Home

n 150mm from a leg.ar to be supported by a leg.er than 150mm from a

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Ultimate Anchorage and Lap Lengths

General Use

Bar Bar size Clear Cover

location (mm) distance top/btm corner

top 25 125 30 2 2 35 1.05

btm 25 100 40 1.4 1.4 Tension anchorage &

side 40 1.4 x tension lap

2.0 x tension lap

Compression anchora

Compression lap leng

Bars Bar size

(mm)

1st bar 12

2nd bar 10

35 1.05

Tension anchorage &

1.4 x tension lap

2.0 x tension lap

Compression anchora

Compression lap leng

Special Situations

35 1.05 12 250 460 35 1.05

Tension anchorage & lap length 432 794 Tension anchorage &

1.4 x tension lap 604 1111 1.4 x tension lap

2.0 x tension lap 863 1587 2.0 x tension lap

Compression anchorage length 345 635 Compression anchora

Compression lap length 432 794 Compression lap leng

Anchorage bond stress design

Ultimate anchorage bond stress Table 3.26 Val

bond coefficient, 0.5

Anchor

Bar type

Anchorage andcu

N/mmm

steel

Anchor

cuN/mm

m

steel

Anchorage and lap lengths (mm)in beams where minimum links have not been provided

Tension lap factors Factor

Equivalent diameters

for pairs of bars (mm)

Equivalent

diameter

15.6

As

required (mm)

cuN/mm

m

steel

Bar size

mmReinforcement type

cuN/mm

m

steel

Note: Minimum laps are 15 x bar sizeor 300mm, whichever is the greater.For fabric, minimum lap is 250mm.

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strength of concrete, cu 35

Ultimate bond stress, bu 2.96

Design anchorage bond stress

Strength of reinforcement 460

safety factor for steel, gm 1.05As required (mm) 208

As provided (mm) 226

Force Fs (kN) 81.1

Anchorage length, l (mm) 600

effective bar size, e (mm) 16

bond stress, b (N/mm) 2.69

Type 2: deformed bars

Fabric

Bars in beams where minimum

links have not been provided

Plain bars

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Bars Cover

6 15

8 20

10 25

12 250 460 Fabric 12 30

lap length 432 445 342 16 35

604 623 479 20 40

863 889 684 25 45

ge length 345 353 275 32 50

th 432 441 343 40 55

50 60

any 250 460 Fabric

lap length 36 38 29

51 52 40

72 75 57

ge length 29 30 23

th 36 37 29

16 250 460 Fabric

lap length 432 445 342

604 623 479

863 889 684

ge length 345 353 275

th 432 441 343

750 1000

ues of bond coefficient

bond coefficient,

ge and lap lengths (mm)for bars not at full stress

lap lengths as multiple of bar sizeBar size

mmReinforcement type

age and lap lengths (mm)

Bar size

mmReinforcement type

As

provided (mm)

Bar size

mmReinforcement type

Home

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bars in compresssion

0.28 0.35

0.5

0.65

0.35

0.63

0.81

bars in tension

0.28

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Bends and Hooks

Minimum former radii, bend and hook allowances

bar size

d r n h r n h

6 12 100 100 18 100 100

8 16 100 100 24 100 100

10 20 100 100 30 100 110

12 24 100 110 36 100 140

16 32 100 150 48 100 180

20 40 100 180 60 110 220

25 50 130 230 100 180 350

32 64 160 290 128 230 450

40 80 200 360 160 280 560

50 100 250 450 200 350 700

Bends

bar size bar size

d y x y x d y1 x16 94 112 91 115 6 71 89

8 93 117 88 120 8 61 85

10 91 121 85 125 10 52 82

12 89 125 82 130 12 52 88

16 85 133 76 140 16 72 120

20 81 141 80 160 20 83 143

25 107 182 128 253 25 109 184

32 130 226 164 324 32 135 231

40 163 283 197 397 40 166 286

50 204 354 247 497 50 208 358

Designed Bends

Minimum radius of bends, r

m

32 75 250 1.05 30 185

Grade 250 bars Grade 460 bars

Grade 250 bars Grade 460 bars

cuN/mm

r

mm

bar size

mm

abmm

yN/mm

Grade 250 ba

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Enter grade and bar size:

460

bar size (mm) 16

Hooks

u y1 x1 u36 58 82 48

48 44 76 64

60 40 80 80

72 56 104 96

96 68 132 128

120 80 160 160

150 122 247 250

192 158 318 320

240 195 395 400

300 244 494 500

Grade 460 bars

reinforcement grade

rs

Home

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Minimum and Maximum Reinforcement

Columns Beams

width, b (mm) 300 width, b (mm)

depth, h (mm) 300 depth, h (mm)

360 4 11

5400 6 34

Maximum at laps 9000 8 38

Links in columnsbar sizes (mm) Side reinforce

smallest largest link

16 25 7 190

300 460

Laps with limited cover

Slabs

bar sizes (mm)

smallest link

25 32 8 200 width, b (mm)

depth, h (mm)

Walls

thickness, h (mm) 250

1000 10 150

10000 25 75

thickness, h (mm) 250

vertical bar size 25

750 8 125

625 10 250

Areas of reinforcementfor rectangular columns (mm)

Areasfor recta

Minimum

bar size

Minimum, (y=460)

Number

of bars

Minimum, (y=250)

Max. compression

yN/mm

max

spacing

Minimum

Maximum

Maximum tension

breadth

b

Minimum areas of

Minimum (y=250)

Minimum (y=250)

Are both lapped bars greater

than 20mm ? NO

max

spacing

cover

(mm)

Minimum (y=460)

Minimum (y=460)

Areas of vertical reinforcement (mm/m)

bar size

(mm)

Spacing

(mm)

Minimum

Maximum

Minimum areas of horizontal reinforcement

bar size

(mm)

Spacing

(mm)

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300

500

360 10 5

300 12 3

6000 32 8

6000 32 8

ent in beams

16 250

1000

225

540 10 125

293 10 250

of reinforcementgular beams (mm)

Number

of bars

bar size

(mm)

einforcement for slabs (mm)

Spacing

(mm)

bar size

(mm)

Spacing

(mm)

bar size

(mm)

Home

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Reinforcing Fabric

Main Cross Main Cross Main Cross

mm mm mm mm mm mm kg/m

Square mesh

A393 200 200 10 10 393 393 6.16

A252 200 200 8 8 252 252 3.95

A193 200 200 7 7 193 193 3.02

A142 200 200 6 6 142 142 2.22

A98 200 200 5 5 98 98 1.54

Structural mesh

B1131 100 200 12 8 1131 252 10.9

B785 100 200 10 8 785 252 8.14

B503 100 200 8 8 503 252 5.93

B385 100 200 7 7 385 193 4.53

B283 100 200 6 7 283 193 3.73

B196 100 200 5 7 196 193 3.05

Long mesh

C785 100 400 10 6 785 70.8 6.72

C636 100 400 9 6 636 70.8 5.55

C503 100 400 8 5 503 49 4.34

C385 100 400 7 5 385 49 3.41

C283 100 400 6 5 283 49 2.61

Wrapping mesh

D98 200 200 5 5 98 98 1.54

D49 100 100 2.5 2.5 49 49 0.77

Nominal

mass

BS4483

Fabric

Mesh size nominal

pitch of wires

Diameter of wire Cross section area

per metre width

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15

22

22

40

57

8

11

15

20

24

29

13

16

21

26

34

57

113

No. of

sheetsper tonne

Home

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NOTES

FOREWORD

SETUP

Screen resolution 800x600 with large fonts: 67%Screen resolution 800x600 with small fonts: 85%

Screen resolution 1024x768 with large fonts: 85%

Screen resolution 1024x768 with small fonts: 105%

KEY INFORMATION

Microsoft Excel

British Standard Specification (BSI)

Support

Registered users may obtain support for this spreadsheet from: chris_buck@biosys.net

Additional Information

Refer to the accompanying README.TXT file for additional information.

USING REINFORCED CONCRETE WORKBOOK

The following colour key is a guide to using the full calculation page spreadsheets.

Input required. 24 Remove value

Computed output Error/ Alert

Message

Clear cell contentsTo clear the contents of a cell, right click your mouse on the cell and then click Clear Con

m STEEL

BS 8110 : Part 1 : 1985 gm = 1.15

This is the partial safety factor for strength of materials for steel reinforcement. The sprea

following options to suit their particular requirements.

This spreadsheet is intended for use by reinforced concrete detailers and designers. It pr

to rapidly determine answers to the many questions that reinforced concrete design and

could be looked on as an electronic book with an index followed by pages containing ma

calculator has a specific task to perform. The Reinforced Concrete Workbook also acts a

user of the various requirements to be observed.

The concept of the workbook is that each table remains independent of the others. No ca

tables. This increases the amount of input but should speed usage as the user does not

outside of the table they are using.

This spreadsheet has been developed to comply with BS 8110 : Part 1 : 1997 and BS 44

published 28 February 1990.

This spreadsheet has been developed for use in Microsoft Excel 97 (v8.0) on the Micros

system.

This spreadsheet has been formatted using Arial, Arial Black, Symbol and Tahoma truety

been optimised for a screen resolution of 1027x768 HiColor (16 bit) using large fonts.

Use the Zoom button on the toolbar to reduce or enlarge the display to suit your compute

permanently store your new settings. Recommended zoom settings are as follows:

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BS 8110 : Part 1 : 1997 gm = 1.05

SHORT CUTS

Entering Numerical Data

Expressions may be entered in place of numbers in cells requiring numerical input. e.g.

the relevant cell. Enter the following: =4+8*3 - This expression evaluates to 28. You wi

double click on the cell or if you have the formula bar showing (go to View menu and clic

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tents.

dsheet user is provided with the

ovides the user with the means

etailing raise. This spreadsheet

y individual calculators. Each

s an aide memoir, reminding the

lculations are linked to other

ave to search for input cells

6 : 1989 and Amendment No. 1

ft Windows 95 operating

pe fonts. The spreadsheet has

r. Use the Save button to

Home

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o enter an expression, select

ill see the expression if you

Formula Bar).

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Version

Version 1.0

chris_buck@biosys.net

Copyright 2000 Chris Buczkowski. All rights reserved.

Registration UNREGISTERED COPY F

Single User Licence: 20

Company multiple-user licence: 20 per copy installed

Delivery will be by attachment to an email.

You should include your e-mail and postal address and a contact telephone number.

Also include the name you require the spreadsheet registered to (30 characters maximu

Licence for Use and Distribution

Disclaimer

Acknowledgements

Thank you to Dr Shaiq U.R. Khan BEng (Civil), MEng, PhD, PE, CEng, FIStructE for his

during the development of this software. He may be contacted by email on shaiq@techn

This spreadsheet is NOT a public domain program. It is copyrighted by the Author*. Thi

Kingdom copyright law and also by international treaty provisions. The Author grants you

evaluation purposes for an indefinite period. You may not use, copy, rent, lease, sel

disassemble, otherwise reverse engineer, or transfer this software except as providunauthorised use shall result in immediate and automatic termination of this licence. All

are reserved to the Author. You may copy and distribute the unregistered version

unaltered, without further permission. The readme.txt file must accompany copies of the

* The Author is Chris Buczkowski.

THIS SOFTWARE IS PROVIDED FOR EVALUATION ONLY, ON AN "AS IS" BASIS. THE AUTH

RELATING TO THIS SOFTWARE, WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT

WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. THE

FOR ANY INDIRECT, CONSEQUENTIAL, OR INCIDENTAL DAMAGES ARISING OUT OF THE

SOFTWARE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE POSSIBILITY OF SU

PERSON USING THE SOFTWARE BEARS ALL RISK AS TO THE QUALITY AND PERF

ALTHOUGH EVERY EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS PRTHE RESULTS FOR THEMSELVES.

REINFORCED CONCRETE WORKFOR MICROSOFT EXCEL

If you have comments, suggestions, bug reports or

require information, please email:

Please ensure you have the latest version of this software, which may be downloadedfrom the internet via this hyperlink : http://www.structural-engineering.fsnet.co.uk

Click the Connect button to go to the web site.

To order a registered copy, please send a cheque payable to

'C. Buczkowski' to the following address:

6 Stanhope Court, 53-55 Stanhope Road, North Finchley, LONDON N12

9DZ (Tel/fax : 020-8445 9438)

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R EVALUATION

).

ncouragement and comments

uk.com

software is protected by United

a licence to use this software for

l, modify, decompile, unprotect,

d in this agreement. Any suchights not expressly granted here

of this spreadsheet, completely

preadsheet.

R DISCLAIMS ALL WARRANTIES

NOT LIMITED TO ANY IMPLIED

UTHOR* SHALL NOT BE LIABLE

USE OR INABILITY TO USE SUCH

H DAMAGES OR CLAIMS. THE

RMANCE OF THE SOFTWARE.

GRAM, USERS SHOULD VERIFY

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