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Wind load on External Hanging Ceiling

Wind load on External Hanging Ceiling

(OP)
Im designing a hanging ceiling for external use. I have to follow ASCE as per the project specification. But when i check the code (ASCE )no separate wind load calculation recommendation for Ceiling. If we consider it as components and cladding (C/C) All the hanging rods (M10) fails because of up wards -ve pressure ( bcz of compression) and need to brace all the hanging threaded rods (M10).Th ceiling is hanging on a concrete slab and i think the internal and external pressure has no effect on the wind load on ceiling. please advice me to find solution for applying correct wind load.

RE: Wind load on External Hanging Ceiling

Somewhere in the ASCE I believe there is a clause that any exterior ceiling must be designed for the wind load equal to the adjacent wall.

The ceiling is going to see more pressure than it is suction and therefore if you need more bracing, then so be it. Might be better to increase the hanging rod size to minimize the level of bracing required.

RE: Wind load on External Hanging Ceiling

Threaded rod will be pretty worthless in uplift. Add compression struts.

RE: Wind load on External Hanging Ceiling

"Unistrut" channels work really well for this type of application. smile
Dave

Thaidavid

RE: Wind load on External Hanging Ceiling

It's hard to say without a sketch. In addition to the C&C method you are using, I'd also check it by Sect. 27.4.3 of ASCE 7-10. If the gap between the slab and the ceiling is small enough (and you wind up having to use compression struts).....it may behave like that to some degree.

RE: Wind load on External Hanging Ceiling

I usually design them for the adjacent wall pressures and use metal studs to from the support structure

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