In Figure 27.4-8 of ASCE 7-10, it shows 4 wind cases you must check. Actually case 2 and 4 can be eliminated in some instances. Anyway, I can't find where they say "boo" about what you're supposed to do with the roof load. I'm thinking of a gable roof. Case 1 is pretty obvious since the wind is blowing either parallel or perpendicular to the roof ridge. But what about case 3 where you have a quartering wind? What I decided to do was use the full design roof pressure for the case when wind is blowing perpendicular to the ridge with the wall pressures shown in case 3. Any thoughts? Is this really not addressed or am I missing it?
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