Single Rc Staircase Design 3w1r5m
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- Words: 890
- Pages: 4
Project
Spreadsheets to BS 8110
Client
Advisory Group
Location
REINFORCED CONCRETE COUNCIL Made by
FLIGHT
South Staircase
rmw
STAIR FLIGHTS AND LANDINGS to BS 8110:1997 Originated from Beta/trial version of RCC71.xls' on CD
MATERIALS fcu 35 fy 460 h agg 20 Cover 25
N/mm² N/mm² mm mm
Checked
DIMENSIONS
a= b= c= d= e= Going = Rise = Rise =
600 2500 1200 -600 -100 250 1900 172.7
Page
3-Sep-12 Revision
chg
© 1999 BCA for RCC
gm 1.5 concrete gm 1.05 steel Density 23.6 kN/m³ (Normal weight concrete)
Date
-
106 Job No
R68
Min bar Ø = 10 Max bar Ø = 16 Nominal top steel ? Y Sectional Elevation
mm landing A h = 175 mm flight waist = 200 mm landing B h = 200 mm mm mm L = 4300 mm total 10 treads mm each step Rake = 34.64 º
LOADING
Imposed Flight finishes Landing finishes
4.00 kN/m² 1.60 kN/m² 1.30 kN/m²
47.08 kN/m ult (20.87 + 11.16)
37.81 kN/m ult (16.91 + 8.84)
DESIGN
LANDING A, gk = 4.13 + 1.30 = 5.43 kN/m² FLIGHT, gk = 7.78 + 1.60 = 9.38 kN/m² LANDING C, gk = 4.72 + 1.30 = 6.02 kN/m²
n = 1.4 x 5.43 + 1.6 x 4.0 = 14.00 kN/m² n = 1.4 x 9.38 + 1.6 x 4.0 = 19.53 kN/m² n = 1.4 x 6.02 + 1.6 x 4.0 = 14.83 kN/m²
Zero shear is at 0.6 + (47.08 - 16.80) /19.53 = 2.151 m from left M = 47.08 x 2.151 - 16.80 x 2.151 - 19.53 x 1.551²/2 = 41.64 kNm/m d = 200 - 25 - 8 = 167 mm K = 0.0427 As = 599 mm²/m PROVIDE T16 @ 300 B = 670 mm²/m Enhanced by 8.5 % for deflection L/d = 4,300 /167 = 25.749 < 20.0 x 1.256 x 1.050 = 26.375 allowed
T10 @ 300 T in span OK
Project
Spreadsheets to BS 8110
Client
Advisory Group
Location
REINFORCED CONCRETE COUNCIL Made by
LANDING
South Staircase
STAIR FLIGHTS AND LANDINGS to BS 8110:1997 Originated from Beta/trial version of RCC71.xls' on CD
MATERIALS fcu 35 fy 460 h agg 20 Cover 25
© 1999 BCA for RCC
gm 1.5 concrete gm 1.05 steel Density 23.6 kN/m³ (Normal weight concrete)
N/mm² N/mm² mm mm
rmw Checked
Date
3-Sep-12 Revision
chg
Page
107 Job No
R68
Min bar Ø = 10 Max bar Ø = 16 Nominal top steel ? Y
DIMENSIONS
a = 1200 mm b = 1200 mm c = 250 mm d = 175 mm
depth, h = 175 mm width, w = 1200 mm L = 3000 mm
LOADING
LANDING
Imposed Finishes Slab gk
Flight a reaction 20.87 Flight b reaction 16.91
4.00 1.50 4.13
kN/m² kN/m² kN/m²
79.3 kN ult 74.0 kN ult 66.1 kN/m ult 61.6 kN/m ult n = 1.4 x 5.63 + 1.6 x 4.0 = 14.28 kN/m²
kN/m kN/m
n1 = (1.4 x 20.87 + 1.6 x 11.16)/1.20 = 39.23 kN/m² n2 = (1.4 x 16.91 + 1.6 x 8.84)/1.20 = 31.51 kN/m²
qk
11.16 8.84
DESIGN
Zero shear is at (66.11 - 2.50) /(14.28 + 39.23) + 0.175 = 1.364 m from left M = 66.11 x 1.364 - 14.28 x 1.364²/2 - 39.23 x 1.189²/2 = 49.15 kNm/m d = 175 - 25 - 8 = 142 mm K = 0.0696 As = 863 mm²/m PROVIDET16 @ 220 B = 914 mm²/m Enhanced by 3.7 % for deflection T10 @ 325 T in span L/d = 3,000 /142 = 21.127 < 20.0 x 1.018 = 21.450 allowed OK
Project Location
Spreadsheets to BS 8110 South Staircase STAIR FLIGHTS AND LANDINGS to BS 8110:1997 Originated from Beta/trial version of RCC71.xls' on CD
Made by rmw
Job No R68
Date 3-Sep-12
© 1999 BCA for RCC
CHOOSE BAR DIAMETERS FLIGHT M h assume d = K z As/m =% Clause b? Smax Dia As nom Dia S As' prov =%
LANDING
41.64 200 169 0.0417 160.55 592.05 0.3503 N 422.50 16
49.15 175 144 0.0677 132.20 848.74 0.5894 N 360.00 16
260 10 300 262 0.1568
228 10 325 242 0.1702
Lookup Tables 8 10 12 16 20 25 32
10 10 10 12 16 16 16 16
10 10 10 12 16 16 16 16
8 10 12 16 20 25 32
10 10 10 12 16 20 25 32
10 10 10 12 16 20 25 32
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. s 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 RCC71 Stair Flight & Landing - Single
Date
Version
06-Aug-99 RCC71v1.0
Action
Size (kB)
First public release. Includes b version comments
147
Spreadsheets to BS 8110
Client
Advisory Group
Location
REINFORCED CONCRETE COUNCIL Made by
FLIGHT
South Staircase
rmw
STAIR FLIGHTS AND LANDINGS to BS 8110:1997 Originated from Beta/trial version of RCC71.xls' on CD
MATERIALS fcu 35 fy 460 h agg 20 Cover 25
N/mm² N/mm² mm mm
Checked
DIMENSIONS
a= b= c= d= e= Going = Rise = Rise =
600 2500 1200 -600 -100 250 1900 172.7
Page
3-Sep-12 Revision
chg
© 1999 BCA for RCC
gm 1.5 concrete gm 1.05 steel Density 23.6 kN/m³ (Normal weight concrete)
Date
-
106 Job No
R68
Min bar Ø = 10 Max bar Ø = 16 Nominal top steel ? Y Sectional Elevation
mm landing A h = 175 mm flight waist = 200 mm landing B h = 200 mm mm mm L = 4300 mm total 10 treads mm each step Rake = 34.64 º
LOADING
Imposed Flight finishes Landing finishes
4.00 kN/m² 1.60 kN/m² 1.30 kN/m²
47.08 kN/m ult (20.87 + 11.16)
37.81 kN/m ult (16.91 + 8.84)
DESIGN
LANDING A, gk = 4.13 + 1.30 = 5.43 kN/m² FLIGHT, gk = 7.78 + 1.60 = 9.38 kN/m² LANDING C, gk = 4.72 + 1.30 = 6.02 kN/m²
n = 1.4 x 5.43 + 1.6 x 4.0 = 14.00 kN/m² n = 1.4 x 9.38 + 1.6 x 4.0 = 19.53 kN/m² n = 1.4 x 6.02 + 1.6 x 4.0 = 14.83 kN/m²
Zero shear is at 0.6 + (47.08 - 16.80) /19.53 = 2.151 m from left M = 47.08 x 2.151 - 16.80 x 2.151 - 19.53 x 1.551²/2 = 41.64 kNm/m d = 200 - 25 - 8 = 167 mm K = 0.0427 As = 599 mm²/m PROVIDE T16 @ 300 B = 670 mm²/m Enhanced by 8.5 % for deflection L/d = 4,300 /167 = 25.749 < 20.0 x 1.256 x 1.050 = 26.375 allowed
T10 @ 300 T in span OK
Project
Spreadsheets to BS 8110
Client
Advisory Group
Location
REINFORCED CONCRETE COUNCIL Made by
LANDING
South Staircase
STAIR FLIGHTS AND LANDINGS to BS 8110:1997 Originated from Beta/trial version of RCC71.xls' on CD
MATERIALS fcu 35 fy 460 h agg 20 Cover 25
© 1999 BCA for RCC
gm 1.5 concrete gm 1.05 steel Density 23.6 kN/m³ (Normal weight concrete)
N/mm² N/mm² mm mm
rmw Checked
Date
3-Sep-12 Revision
chg
Page
107 Job No
R68
Min bar Ø = 10 Max bar Ø = 16 Nominal top steel ? Y
DIMENSIONS
a = 1200 mm b = 1200 mm c = 250 mm d = 175 mm
depth, h = 175 mm width, w = 1200 mm L = 3000 mm
LOADING
LANDING
Imposed Finishes Slab gk
Flight a reaction 20.87 Flight b reaction 16.91
4.00 1.50 4.13
kN/m² kN/m² kN/m²
79.3 kN ult 74.0 kN ult 66.1 kN/m ult 61.6 kN/m ult n = 1.4 x 5.63 + 1.6 x 4.0 = 14.28 kN/m²
kN/m kN/m
n1 = (1.4 x 20.87 + 1.6 x 11.16)/1.20 = 39.23 kN/m² n2 = (1.4 x 16.91 + 1.6 x 8.84)/1.20 = 31.51 kN/m²
qk
11.16 8.84
DESIGN
Zero shear is at (66.11 - 2.50) /(14.28 + 39.23) + 0.175 = 1.364 m from left M = 66.11 x 1.364 - 14.28 x 1.364²/2 - 39.23 x 1.189²/2 = 49.15 kNm/m d = 175 - 25 - 8 = 142 mm K = 0.0696 As = 863 mm²/m PROVIDET16 @ 220 B = 914 mm²/m Enhanced by 3.7 % for deflection T10 @ 325 T in span L/d = 3,000 /142 = 21.127 < 20.0 x 1.018 = 21.450 allowed OK
Project Location
Spreadsheets to BS 8110 South Staircase STAIR FLIGHTS AND LANDINGS to BS 8110:1997 Originated from Beta/trial version of RCC71.xls' on CD
Made by rmw
Job No R68
Date 3-Sep-12
© 1999 BCA for RCC
CHOOSE BAR DIAMETERS FLIGHT M h assume d = K z As/m =% Clause b? Smax Dia As nom Dia S As' prov =%
LANDING
41.64 200 169 0.0417 160.55 592.05 0.3503 N 422.50 16
49.15 175 144 0.0677 132.20 848.74 0.5894 N 360.00 16
260 10 300 262 0.1568
228 10 325 242 0.1702
Lookup Tables 8 10 12 16 20 25 32
10 10 10 12 16 16 16 16
10 10 10 12 16 16 16 16
8 10 12 16 20 25 32
10 10 10 12 16 20 25 32
10 10 10 12 16 20 25 32
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. s 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 RCC71 Stair Flight & Landing - Single
Date
Version
06-Aug-99 RCC71v1.0
Action
Size (kB)
First public release. Includes b version comments
147
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