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Wind load calculation on pitched roofs of buildings

 
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kawshik9
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PostPosted: Sun Mar 15, 2020 5:59 am    Post subject: Wind load calculation on pitched roofs of buildings Reply with quote

Dear SEFIians,


I have doubt in calculating wind load on pitched roofs of buildings, Kindly clarify my doubt.


As per Table 5 of IS 875 part-3, For wind in 90 degrees direction, Cpe coefficients are given for EG & FH regions. EG region corresponds to L/4 length of building and FH region to another L/4 length. What about another L/2 length of the building on lee ward side ?  What force we should consider for another L/2 length of building in leeward side? or We need not take an wind load for this region.




Thanks and regards,


Ramakanth
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es_jayakumar
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PostPosted: Fri Mar 27, 2020 1:59 am    Post subject: Reply with quote

In this case, you consider the wind is blowing in the reverse direction at θ = -900,ie, from bottom to top on plan. Then you can make use of the same Cpe coefficients as for  EF & GH, for the bottom 2 segments each of L/4 length, in a mirror image fashion.

E S Jayakumar
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thirumalaichettiar
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PostPosted: Wed Apr 08, 2020 1:14 am    Post subject: Reply with quote

Dear Er.kawshik9,


Please refer the attached PDF file for your reference.  I may add more after going through my files.

Thanks,
T.RangaRajan.



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Cpe VALUE FOR TRUSS ROOF.pdf
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INTERNAL PRESSURE AS PER IS CODE.pdf
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EXAMPLE ROOF WIND LOAD AS PER IS 875-3.pdf
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