I've been reading up on chapter 6 (Wind loads) of ASCE 7 and have some questions. What is the difference between "fastest mile per hour wind" and "3 second gust wind"? Which one is larger? which one do you design for? I'm having trouble gauging wind speeds and what they mean in real life. Using section 2 I calculated that an 85 mph wind is equal to a 31 psf. Is 31 psf a lot? I'm supposed to check for a load of 75 psf as well since it's an industrial structure. The siding has to fail at 75 since the superstructure is only designed to handle 75 psf. 75 psf is high, but how high. I can't "visualize" it since it is intangible. Is the wind due to a tornado?
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