Open building wind loading (ASCE 7-16, Section 27.3.2)

[Newbie84]

I apologize in advance for how basic this question may be. I've been teaching myself the code since I did not study Civil in school (I have a degree in Materials Engineering), and while I've made good progress so far in understanding wind loading per ASCE 7-16, I'm stuck on open roof structure loading, which I thought would be one of the easier concepts to absorb. That said:

Does anyone have a good online resource that can guide me through a complete analysis of an open roof structure? I've looked at several examples from different sources, including the ICC Wind Design Manual, and still don't understand how wind pressure generated from wind in the 0 and 180-degree "normal" direction (Figures 27.3-4 through 27.3-6) interacts with wind in the 90-degree "transverse" direction (Figure 27.3-7). I have found examples that just consider pressure generated from the "normal" wind direction, one that compared pressure from "normal" and "transverse" wind and used the worst-case scenario for analysis, AND one that combined the "normal" and "transverse" wind pressures. My question that I'm hoping a good resource can answer for me is this: What is the correct way to use these figures to analyze open roof structures? Any help would be greatly appreciated!

 

[EDub24]

I'm in CA so I don't do much wind design as seismic almost always controls but have you looked a the diagram 27.7-8? It gives the different wind cases to consider including combing the different directions.

 

[r13]

This thread may help. Link