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Staircase Design Calculation Details with Excel Sheet |
Hey, I'm Engr. Bala Ram, Today I share wall supported and beam supported staircase design calculation details. I also share this calculation excel spreadsheet.
How to calculated wall supported staircase design:
Sep - 1: An example Stir riser height R = 6 inches, trade length L = 10 inches (you can change data in excel spreadsheet)
Concrete compressive strength, f'c = 3000 psi.
Yield stress or strength, fy = 60000 psi.
- Effective Span Length
First landing span, L1 = 3.50 feet.
Waist slab horizontal span, L2 = 7.50 feet.
Second landing span, L3 = 4.00 feet.
Total Horizontal Span, L = L1 + L2 + L3 = 15.00 feet.
Waist slab horizontal span, L2 = 7.50 feet.
Second landing span, L3 = 4.00 feet.
Total Horizontal Span, L = L1 + L2 + L3 = 15.00 feet.
- Thickness of Waist Slab
Waist slab thickness, t = Slab Span / 20 = 9.00 inchs.
Say, slab thickness, t = 7 inches. so, d = 7-1 = 6 inches.
- Loads on Slab
D.L. of Slab on the slope with landing slab = (t*12)/150 = 87.50 psf.
D.L. due to Riser =
=120.04 psi.
Live load = 100.00 psf, and F.F = 30.00 psf.
Total D.L = 219.54 psf, and L.L = 100.00 psf.
Ultimate Load, w = 1.4*D.L + 1.7*L.L = 477.36 psf.
- Moment
Moment for Simply Supported Span,
- Checking Thickness
- Main Reinforcement
- Distribution Reinforcement (Temp & Shrin. Reinforcement)
- Reinforcement in the Landing Slab
Load Between A-B = 1.4x(Load (1) + Load (4)) + 1.7x Load (3)
= 334.50 psf or lb/ft.
Load Between C-D = 1.4x(Load (1) + Load (4)) + 1.7x Load (3)
= 334.50 psf or lb/ft.
Load Between B-C = 1.4x(Load (1) + Load (2)) + 1.7x Load (4)
= 477.33 psf or lb/ft.
The reaction at A, RA = 3062.33 lb
Moment at A, MA = RA*L1 - Load (A-B)*L1*L1/2
= 8669.33 lb-ft/ft. = 104031.94 lb-in/ft.
- Reinforcement (Main): -
- Reinforcement (Temp): - The minimum reinforcement required to control the shrinkage and temperature cracking:
- Reinforcement (Main): -
- Shear Check
The factored shear force at a distance "d" from the face of the support:-
- Final Design
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Staircase Design Calculation |
How to calculated Beam supported staircase design:
You can calculate beam supported staircase design. This is the same prosses of wall supported staircase design calculation. In the Excel Spreadsheet, you can full idea, how to design the beam supported staircase.
Download design calculation excel file:
Those spreadsheet uploaded in google drive. You can easily open and download this file. For any problem in the calculation, Ask your any question in the comment box. Thank you.
6 Comments
Dami... I liked it
ReplyDeleteThanks.. keep supporting...
DeleteMay Allah help you.
ReplyDeleteI can't thank you enough. thanks for your excel sheet. you are really helpful person.
ReplyDeleteThank you so much.
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