RIBBED SLAB DESIGN to BS 81101997 using table 3.12 coefficients.xls

Project

Spreadsheets to BS 8110

Client Location

Advisory Group Made by 2nd Floor slab rmw RIBBED SLAB DESIGN to BS 8110:1997 using table 3.12 coefficients Checked Originated from RCC92.xls on CD © 1999 BCA for RCC chg

LOCATION

Supports Supports from on grids grid

A

REINFORCED CONCRETE COUNCIL

to grid

Date

Page

03-Mar-2013 Revision

119 Job No

prelim

F

R68

STATUS

VALID DESIGN DIMENSIONS Nº of spans Nº Max Span m depth o/a, h mm topping depth, hf mm Top steel in spans ? Min No of bars per rib Use Links? Y LOADING Self Wt + Dead Total Dead, gk Imposed qk Design load, n =

5 rib width 7.200 rib centres 300 Side slope 100 Y Top cover (to links) 2 B/S cover (to links) (Y)es, (N)o or (M)inimal

4.00 1.50 5.50 5.00 15.70

kN/m² kN/m² kN/m² kN/m² kN/m²

BENDING

mm 1 in mm mm

A

MATERIALS fcu N/mm² fy N/mm² fyv N/mm² h agg mm

150 750 10

150 32.6 254 231 0

gc = 1.50 gs = 1.05 Density kN/m³ 24.0 (Normal weight concrete)

35 460 250 20

35 25

F

A

F

Geometry and Loading

END SUPPORTS (A & F)

Width solid from CL M kNm/m d mm As mm² As' mm²

mm

Indicative Bending Moment Diagram

END SPANS

FIRST INT SUPPORTS

INTERIOR SPANS

INTERNAL SUPPORTS

--61.1 259 425 0

500 70.0 249 507 0

--51.3 261 354 0

500 51.3 249 371 0

BS8110 Reference Table 3.12 Fig 3.3 Fig 3.3

DEFLECTION

L/d Max Actual L/d

39.894 27.799 OK As auto increased by 17.8%

35.466 27.586 OK As auto increased by 12.6%

3.4.6.3 3.4.5.1

TENSION REINFORCEMENT

Ø No As prov =

10 3 Top+3T10 mm² 471 % 0.247

20 2 Btm 628 1.427

20 2 Top+2T10 785 0.421

16 2 Btm 402 0.906

20 2 Top+2T10 785 0.421

20 2 Btm 628 1.455

8 2 Top 101 0.228

12 2 Btm 226 0.534

8 2 Top 101 0.227

10 2 Btm 157 0.371

OUTER SUPT

FIRST INT SUPT

INT SUPT

37.2 0.863 0.897 6 175

45.0 1.063 0.908 6 175

36.5 0.863 0.908 6 175

18.23 16.56 52.01

43.59 39.60 124.38

39.63 36.00 113.08

END

END SPANS 2T8 T

FIRST INT SUPPORTS 2T20 /rib + 2T10 T Nominal B 2R6 @ 175

mm

COMPRESSION ZONE REINFORCEMENT

Ø No As' prov =

mm² %

RIB SHEAR V v vc Link Ø @ REACTIONS Dead Imposed Ultimate

kN/rib N/mm² N/mm² mm kN/m kN/m kN/m

mm

Table 3.12 Eqn 3

NOMINAL

Table 3.8

6 175 solid weight included Table 3.12

OUTPUT/SUMMARY PROVIDE SUPPORTS MAIN STEEL 3T10 /rib + 3T10 T Nominal B LINKS 2R6 @ 175

2T20 B 2R6 @ 175

from edge of solid CHECKS

INTERIOR SPANS 2T8 T 2T16 B 2R6 @ 175

for 875

BAR Ø & COVER

SINGLE LAYERS

BAR SPACING

INTERNAL SUPPORTS 2T20 /rib + 2T10 T Nominal B 2R6 @ 175 for 175

DEFLECTION

SHEAR LINKS

GLOBAL STATUS

Project

Spreadsheets to BS 8110

Client Location

Advisory Group Made by 2nd Floor slab from grids A to F rmw RIBBED SLAB DESIGN to BS 8110:1997 using table 3.12 coefficients Checked Originated from RCC92.xls on CD © 1999 BCA for RCC chg END

DEFLECTION SUPPORTS fs N/mm² 234.2 Base ratio Tens Mod Comp Mod Perm L/d Actual L/d As req increased by

REINFORCED CONCRETE COUNCIL Date

Page

03-Mar-2013 Revision

prelim

END SPANS

FIRST INT SUPPORTS

INTERIOR SPANS

INTERNAL SUPPORTS

207.4 20.80 1.791 1.071 39.894 27.799 17.8%

143.4

270.1 20.80 1.593 1.070 35.466 27.586 12.6%

90.0

ok

121 Job No

R68 BS 8110 Reference Eqn 8 3.4.6.3/4 Table 3.10 Table 3.11 3.4.6.3

ok

3.4.5.1

RIB SHEAR

Factor V max V rib v vc (v-vc)bv Link Ø @ adjust to for adjust to As Dist As' Dist

END SUPPORTS

FIRST INT SUPPORTS

INTERNAL SUPPORTS

ok

0.46 52.01 37.24 0.8625 0.8975 68.0 6 191 175 0 0 130.8

ok

0.6 67.85 44.99 1.0630 0.9080 68.0 6 187 175 795 875 121.8

ok

0.5 56.54 36.51 0.8626 0.9080 68.0 6 187 175 75 175 121.8

ok

0

ok

0

ok

0

kN/m kN/m N/mm² N/mm² N/mm

ok mm mm mm mm

ok

ok

Table 3.12 -=Eqn 3

NOMINAL

Table 3.8 Table 3.7

ok

68.0 6 196 175 ----125.4

OK

3.4.5.5

ok

0

OK

3.12.7.2

ok

3.12.7.1 Spacing Spacing from solid from solid

Project Location

Spreadsheets to BS 8110 2nd Floor slab RIBBED SLAB DESIGN to BS 8110:1997 using table 3.12 coefficients Made by rmw Originated from RCC92.xls on CD

No Off

Date 3-Mar-13

© 1999 BCA for RCC

APPROXIMATE WEIGHT of REINFORCEMENT

Job No R68

(mesh excluded)

No

Type

Dia

Length

Unit Wt

Weight

2 2 2 2 2 3 2 2

3 3 2 2 2 2 2 2

T T T T T T T T

10 10 8 20 10 8 20 10

2025 2025 4225 3600 3600 4225 3600 3600

0.617 0.617 0.395 2.466 0.617 0.395 2.466 0.617

7.5 7.5 6.7 35.5 8.9 10.0 35.5 8.9

2 2 2 3 2

2 2 2 2 2

T T T T T

20 20 10 16 10

1175 6850 1125 6850 1125

2.466 2.466 0.617 1.578 0.617

11.6 67.6 2.8 64.9 2.8

2 2 3 3

7 31 4 32

R R R R

6 6 6 6

825 825 825 825

0.222 0.222 0.222 0.222

2.6 11.4 2.2 17.6

11.2

kg/m²

TOP STEEL End support End span First Int support Internal span Internal support

BOTTOM STEEL End support End span First Int support Internal span Internal support LINKS End span Internal span

SUMMARY

Density =

Approx. total reinf. per rib (kg)

303.7

Project Location

Spreadsheets to BS 8110 2nd Floor slab GRAPH DATA I

RIBBED SLAB DESIGN to BS 8110:1997 using table 3.12 coefficients Originated from RCC92.xls on CD

LOADING DIAGRAM Support 1 Distance 0 0 Dead 0 5.00 Imposed 5 6.50 Base 0 0 1 Grids 0 0 -1.3 0

2 7.2 5 6.5 0

Made by rmw

© 1999 BCA for RCC

3 14.4 5 6.5 0 2 7.2 -1.3

4 21.6 5 6.5 0 7.2 0.00

5 28.8 5 6.5 0

6 36 5 6.5 0 3 14.4 -1.3

7 36 0 5 0 14.4 0

8 36 0 5 0

9 36 0 5 0 4 21.6 -1.3

36 0 5 0

gk = qk =

5.50 5.00

5 28.8 -1.3

21.6 0

Job No R68 Date 3-Mar-13

gk = 5.50 kN/m² qk = 5.00 kN/m²

28.8 0

6 36 -1.3

36 0

7 36 -1.3

36 0

8 36 -1.3

36 0

3 0 14.4 0 51.291

0.72 15.12 0 14.655

9 36 -1.3

36 0

BM DIAGRAM Support Local X Global X Base Moment B Labels M Labels Grids

0 0 0 0

1 0 0 0 16.283

A 32.566 0 0 -59.921 77.018

End 0.72 1.44 2.16 2.88 3.6 4.32 5.04 5.76 6.48 0.72 1.44 2.16 2.88 3.6 4.32 5.04 5.76 6.48 0 0 0 0 0 0 0 0 0 -14.98 -38.102 -53.082 -59.921 -58.619 -49.174 -31.589 -5.8619 28.007 36.637 65.132 85.485 97.698 101.77 97.6975 85.485 65.132 36.637

7.2 7.2 -59.921 77.018

61.061 14.4 14.4 -59.921 77.0182

2 0 7.2 0 70.017

0.72 7.92 0 31.507

Mid 1.44 2.16 2.88 3.6 4.32 5.04 5.76 6.48 8.64 9.36 10.08 10.8 11.52 12.24 12.96 13.68 0 0 0 0 0 0 0 0 1.1398 -21.086 -35.171 -41.114 -38.916 -28.577 -10.095 16.527

to grid 70.017 21.6 21.6 -59.921 77.018

28.8 28.8 -59.921 77.018

51.291 36 36 -59.921 77.018

36 36 -59.921 77.018

2 51.291 36 36 -59.921 77.018

1.44 15.84 0 -13.84

Mid 2.16 2.88 3.6 16.56 17.28 18 0 0 0 -34.194 -46.406 -50.477

51.291 36 36 -59.921 77.018

Project Location Job No R68

Spreadsheets to BS 8110 2nd Floor slab

Project Location

GRAPH DATA II

RIBBED SLAB DESIGN to BS 8110:1997 using table 3.12 coefficients Originated from RCC92.xls on CD

4.32 5.04 18.72 19.44 0 0 -46.406 -34.194

5.76 20.16 0 -13.84

6.48 20.88 0 14.655

Made by rmw

© 1999 BCA for RCC

4 0 21.6 0 51.291 0 51.291

Mid 0.72 1.44 2.16 2.88 3.6 4.32 5.04 5.76 22.32 23.04 23.76 24.48 25.2 25.92 26.64 27.36 0 0 0 0 0 0 0 0 16.527 -10.095 -28.577 -38.916 -41.114 -35.171 -21.086 1.1398

51.291

6.48 28.08 0 31.507

5 0 28.8 0 70.017 0 70.017

End 0.72 1.44 2.16 2.88 3.6 4.32 5.04 5.76 29.52 30.24 30.96 31.68 32.4 33.12 33.84 34.56 0 0 0 0 0 0 0 0 28.007 -5.8619 -31.589 -49.174 -58.619 -59.921 -53.082 -38.102

61.061

6.48 35.28 0 -14.98

6 0 36 0 16.283 3 32.566

Job No R68 Date 3-Mar-13

0 36 0 0

0 36 0 0

0 36 0 0

0 36 0 0

Spreadsheets to BS 8110 2nd Floor slab GRAPH DATA III

RIBBED SLAB DESIGN to BS 8110:1997 using table 3.12 coefficients Originated from RCC92.xls on CD

0 0 36 0 0

0 36 0 0

0 36 0 0

Made by rmw

© 1999 BCA for RCC

0 36 0 0

0 36 0 0

7 0 36 0 0 0

0 36 0 0

0 36 0 0

0 36 0 0

0 36 0 0

0 0 36 0 0

0 36 0 0

0 36 0 0

0 36 0 0

0 36 0 0

8 0 36 0 0 0

0 36 0 0

0 36 0 0

0 36 0 0

0 36 0 0

0 0 36 0 0

0 36 0 0

0 36 0 0

0 36 0 0

Job No R68 Date 3-Mar-13

0 36 0 0

9 0 36 0 0 4

Disclaimer All advice or information from the British Cement Association and/or Reinforced Concrete Council is intended for those who will evaluate the significance and limitations of its contents and take responsibility for its use and application. No liability (including that for negligence) for any loss resulting from such advice or information is accepted by the BCA, RCC or their subcontractors, suppliers or advisors. Users should note that all BCA software and publications are subject to revision from time to time and should therefore ensure that they are in possession of the latest version. This spreadsheet should be used in compliance with the accompanying publication 'Spreadsheets for concrete design to BS 8110 and EC2' available from British Cement Association, Telford Avenue, Crowthorne, Berkshire RG45 6YS.

Status of spreadsheet Public release version. Revision history RCC92 Ribbed Slabs (Tables)

Date

Version

03-Aug-99 RCC92 v1.0

Action First public release. Includes b version comments

Reinforced Concrete Council is contents and take responsibility r any loss resulting from such s, suppliers or advisors. Users n from time to time and should

publication 'Spreadsheets for Association, Telford Avenue,

Size (kB) 203