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LELE AND ASSOCIATES ...

Joined: 17 Apr 2010 Posts: 130
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Posted: Mon Dec 11, 2023 11:43 am Post subject: Application of wind load on open structure |
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Hello Sefians
I am designing an open shed without cladding on all four sides with a steel roof on the top, the sketch is attached herewith for reference.
I am trying to apply wind load on this structure and following example 16 of the handbook (copy attached herewith). I am unable to follow the way the handbook has explained it. Secondly, how is the load on the columns applied?
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HANDBOOK FOR WIND LOAD-IS-875-PART-3.pdf |
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sakumar79 ...

Joined: 18 Apr 2008 Posts: 716
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Posted: Wed Dec 13, 2023 1:50 am Post subject: |
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Dear Sir
You can follow example 16 for the calculation. There will be no wind load on the column directly as the shed is open. However, you may review if you need to consider the possibility of the shed being fully clad or clad on 3 sides in the future. Especially, shed being clad on 3 sides will be cricital. Both will create wind load on walls / columns.
Yours sincerely
S Arunkumar
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vikram.jeet General Sponsor

Joined: 26 Jan 2003 Posts: 3917
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Posted: Wed Dec 13, 2023 3:38 am Post subject: |
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Wind load on open shed columns :-
I think forces from roof create column moments apart from any possibility of cladding. As follows:-
1. Difference between windward and leeward forces on sloping roof create horizontal forces at columns top. Thereby creating moments .
2. Wind uplift force from roof on columns creating direct tensile force in columns
3. Even if shed is open,, there is Facia/Flashing at top on sides and horizontal forces will cause moments in columns
4. Possibility of some partial height from floor cladding / temporary / permanent will transfer horz forces to columns.
5 Horz wind forces on ridge pieces will create moments in columns
Modelling shall reflect 3, 4 & 5 . Item 1&2 are taken care in truss modelling
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