ASCE 7-05- Edge Zones

[a2mfk]

I'll push it with two ASCE posts in a row, I know, these are boring...

I cannot find any direction in ASCE if you have a building with a corner > 90 degrees. I have a building with inside corners = 143 degrees, it is my understanding this would have less of an edge zone effect as the wind wraps around the corner.

I will stick with 2a for the MWFRS edge length, but could I interpolate between the factors for edge zone and interior wall zone factors?
90 degree= edge zone = 1e/4e
180 degree= interior zone/ flat wall = 1/4
143 degree > interpolate for GCp

Seems reasonable to me, and I can always just use edge zone values to be conservative, but its a big building with large lateral loads...

Thanks in advance.

 

[Ron]

a2...stick to the conservative...as I've probably stated too many times, my practice is forensic...in the event of an issue, there will always be someone to disagree with your approach, right or wrong...but they can cast doubt and create grief for you. Just easier if you have two choices of interpretation, pick the one you can easily justify.

 

[rscassar]

I don't use ASCE for wind loading, but to me the local pressures on the side wall would be there regardless of the edge being 90 or 143deg. I would not try to reduce the factor by linear interpolation and treat the edge as a 90deg corner for the sake of calculating wind forces.