Wind Load on Conical Roof

[Flexural23]

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

Thanks!

 

[Flexural23]

Bump

 

[allgoodnamestaken]

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

 

[racookpe1978]

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.

 

[robyengIT]

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

 

[thaidavid40]

@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