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sathyace ...
Joined: 04 Jun 2011 Posts: 78
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Posted: Thu Jan 09, 2020 4:17 am Post subject: Staircase waist slab self weight calculation |
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Hi all,
Self weight of staircase = 25 X 0.15 X Sqrt(R^2+T^2)/T
25 - Unit weight of RCC(kN/m^2)
0.15 - waist slab thickness(m)
What is the reason we are dividing with T ?
The load acts vertically downwards.The load acting along the inclined slab is the cosine value of (25X0.15)?
Please explain.
Thanks&Regards,
Sathya. |
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es_jayakumar General Sponsor
Joined: 24 Nov 2011 Posts: 1408 Location: Cochin
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Posted: Thu Jan 09, 2020 10:30 am Post subject: |
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Sqrt(R^2+T^2)/T is nothing but 1/Cosθ, (θ being the inclination of the waist slab to the horizontal) which is multiplied to convert the dead load of the waist slab per unit area along the inclination, to load per unit area projected in the horizontal plane.
E S Jayakumar |
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sathyace ...
Joined: 04 Jun 2011 Posts: 78
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Posted: Sat Jan 11, 2020 2:19 pm Post subject: |
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Thank you sir. |
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