Project Spreadsheets to BS 8110 Client Advisory Group Made by Date Page

Location North Staircase RMW 7-Apr-23 111

REINFORCED CONCRETE STAIRCASES to BS 8110:1997 Checked Revision Job No

Originated from RCC72.xls on CD © 1999 BCA for RCC chg - R68

FLIGHT 5Waist = 150 mm a = 2.500 m b = 0.600 m c = 0.600 m

L = 3.700 m

Waist 4.20Steps 1.88

Finishes 0.506.57 kN/m² n5 = 15.60 kN/m² 19.50 19.50

M = 19.50 x ( 1.850 - 0.625 ) = 23.89 kNm/m d = 124 mm K = 0.0444

As = 557 mm² PROVIDE 8 T12 @ 150 B = 905 mm² L/d = 29.839 < 30.582 allowed OK

As increased by 53.6 % for deflectionLANDING 4+7.000 m

h = 150 mm L = 2.800 m

Self wt 3.54 n5 = 16.25 kN/m²

Finishes 1.30 n4 = 16.25 kN/m²

4.84 kN/m² nd = 13.18 kN/m² 37.95 37.95

M = 37.95 x 1.400 - 12.91 - 14.14 = 26.08 kNm/m d = 124 mm K = 0.0485

As = 611 mm² PROVIDE 6 T12 @ 220 B = 679 mm² L/d = 22.581 < 23.899 allowed OK

As increased by 3.4 % for deflectionFLIGHT 6

Waist = 150 mm a = 2.500 m b = 0.600 m c = 0.375 m

L = 3.475 m

Waist 4.20Steps 1.88

Finishes 0.506.57 kN/m² n6 = 15.60 kN/m² 18.24 20.77

M = 18.24 x ( 1.769 - 0.585 ) = 21.61 kNm/m d = 124 mm K = 0.0401

As = 502 mm² PROVIDE 6 T12 @ 220 B = 679 mm² L/d = 28.024 < 29.072 allowed OK

As increased by 27.0 % for deflectionLANDING 5+8.750 m

h = 150 mm L = 2.800 m

Self wt 3.54 n5 = 16.25 kN/m²

Finishes 1.30 n6 = 15.20 kN/m²

4.84 kN/m² ne = 13.18 kN/m² 37.65 36.99

M = 37.65 x 1.377 - 12.49 - 13.69 = 25.65 kNm/m d = 124 mm K = 0.0477

As = 600 mm² PROVIDE 6 T12 @ 220 B = 679 mm² L/d = 22.581 < 24.346 allowed OK

As increased by 2.7 % for deflectionLANDING 6+10.500 m

h = 150 mm L = 2.800 m

Self wt 3.54 n6 = 27.69 kN/m²

Finishes 1.304.84 kN/m² nf = 13.18 kN/m² 26.46 43.66

M = 43.66 x 1.119 - 8.25 - 15.10 = 25.52 kNm/m d = 125 mm K = 0.0467

As = 592 mm² PROVIDE 5 T10 @ 160 B = 393 mm² L/d = 22.400 < 23.383 allowed OK

As increased by 1.0 % for deflection

REINFORCED CONCRETE COUNCIL

Project Spreadsheets to BS 8110

Location North StaircaseREINFORCED CONCRETE STAIRCASES to BS 8110:1997 Made by RMW Job No R68

Originated from RCC72.xls on CD © 1999 BCA for RCC Date 7-Apr-23

CHOOSE BAR DIAMETERS

Flight 1 Flight 2 Landing 1 Flight 3 Landing 2 Flight 4 Landing 3 Flight 5 Landing 4 Flight 6 Landing 5 Landing 6

M 15.60 23.89 24.48 23.89 26.08 23.89 26.08 23.89 26.08 21.61 25.65 25.52h 150 150 150 150 150 150 150 150 150 150 150 150

assume d = 124 124 124 124 124 124 124 124 124 124 124 124K 0.0290 0.0444 0.0455 0.0444 0.0485 0.0444 0.0485 0.0444 0.0485 0.0401 0.0477 0.0474z 117.80 117.55 117.38 117.55 116.92 117.55 116.92 117.55 116.92 117.80 117.04 117.08

As/m 302.23 463.94 475.98 463.94 509.10 463.94 509.10 463.94 509.10 418.67 500.33 497.54= % 0.2437 0.3741 0.3839 0.3741 0.4106 0.3741 0.4106 0.3741 0.4106 0.3376 0.4035 0.4012

Clause b? N N N N N N N N N N N NSmax 310.00 310.00 310.00 310.00 310.00 310.00 310.00 310.00 310.00 310.00 310.00 310.00

Min spaces 4 4 4 4 4 4 4 4 4 4 4 3S 277.00 277.00 277.00 277.00 277.00 277.00 277.00 277.00 277.00 277.00 277.00 219.33

Dia 10 12 12 12 12 12 12 12 12 12 12 10

0 68 810 1012 1216 1620 2025 2532 32

Disclaimer

Status of spreadsheet

Public release version.

Date Version Action

03-Aug-99 RCC72 v1.0 429

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.

Revision history RCC72 Stairs & Landings - Multiple

Size (kB)

First public release. Includes b version comments