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Wind Load on Conical Roof

Wind Load on Conical Roof

Wind Load on Conical Roof

(OP)
Anyone have some good documentation pertaining to calculating wind loads for Conical Roofs? Preferably following NBCC, but any would do.

Thanks!

RE: Wind Load on Conical Roof

(OP)
Bump

RE: Wind Load on Conical Roof

I have not seen provisions for a conical roof, but perhaps a rational approximation with a domed or hip roof?

RE: Wind Load on Conical Roof

Use a round column of that actual height, or 80% of the actual height to be a bit more liberal.

A domed roof would only be right for a cone as high as it is wide, but a round tower wind loads will apply the conservative solution (higher load). Theoretically, a cone has half the projected cross-section of a cylinder - but as an approximation, you can justify the 80% height rule as reasonable.

RE: Wind Load on Conical Roof

why not to divide the cone height in layers and consider each layer as a round column with decreasing diameters ?

RE: Wind Load on Conical Roof

@allgoodnamestaken's suggestion regarding using a hipped roof seems a reasonable one. Maybe you could further modify the tributary zones' pressures by multiplying by the circular profile coefficient?
Dave

Thaidavid

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