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 ASCE 7-22 Ch 30 Pt 2 - Buildings > 60 ft: Windward vs Leeward & Side wall

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  • ASCE7-22
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Chris Rosencutter posted 08-26-2024 08:57 AM

In ASCE 7-22 Ch 30 Pt 2 is the criteria for components and cladding for a tall building with h > 60 ft.  The equations use q and qi, and in the case of the walls (zone 4 or 5) the values are dependent upon whether it is a windward, leeward or side walls.  

In the case of Components and Cladding we don't seem to care about wind direction. My confusion lies in that any zone 4 or 5 point on the building can be considered a windward, leeward or  side wall depending upon the wind direction.  If you apply the equations the C&C pressures will always be the most extreme for the Leeward and Sidewall calculation, because those are based upon q = qi = qh. 

Is there a reason that this section differentiates windward, leeward and side walls for the calculations and handles them differently?  

Thanks in advance,

Chris Rosencutter

Chris Rosencutter's profile image
Chris Rosencutter

I think I have answered this question for myself.  When looking at ASCE 7-22 Figure 30.4-1 Note 4 they indicate +GCp values use qz and -GCp values use qh.  I think +GCp are representing windward walls and -GCp are representing side and leeward walls.  I was incorrectly considering both +GCp and -GCp values for Windward and Leeward/Side walls.