Gentlemen,
I am so far over my head it's not even funny. But that's never stopped me before... Anyway, a look at Simplified Engineering for Architects and Builders gives static pressure as:
Qs (psf)=0.00256*V*V (mph).
That happens to agree with Michal. A friend who designed towers for the telephone used factors of 20 psf for 70 mph and 40 psf for 100 mph. That also agrees with Qs with a added safety factor of approx. 50%. Anyway it would be nice to see examples of how Qs is actually used. For example what would be the uplift on a 20'x20' pavilion with a given slope? And if I wanted to get even deeper over my head, I might ask if the uplift came from the wind moving over the top of the roof or from below or even some combination.
