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# Wind Loads on Open Buildings in ASCE-7

## Wind Loads on Open Buildings in ASCE-7

(OP)
I posed this question in Sturtural-other, but this looks like the better forum.  Please excuse the duplication, but my question is how to determine wind loads on open buildings with other than monoslope roofs.  ASCE-7 Chapter 6 seems to sidestep this issue entirely, as does the "Guide to ...".  I assume I've missed something.  I'm making a post mid-life change in area of specialization, and any help is appreciated.

### RE: Wind Loads on Open Buildings in ASCE-7

MBMA (Metal Building Manufacturer's Association) had information in their old manual for open conditions.  For wind that was blowing parallel to the frames, generally on the sidewalls of the building they stated the following:
For open buildings, a coefficient of +1.05 shall be applied to the covered areas of zones 1 and 5 (windward wall surfaces); a coefficient of -1.05 shall be applied to the covered areas of zones 4 and 6 (leeward wall surfaces).

For wind blowing perpendicular to the frames, generally on the endwalls of the building they stated the following:
A coefficient of 1.8N (N = number of frames) shall be applied to the solid area of the largest frame projected onto a plane normal to the ridge.
Additional information is available but is too voluminous to type here.  If you will post your email address, I will email the appropriate pages.  Note that these coefficients are based on the old fastest mile wind speeds, so may not be totally correct for use with newere 3-second gust wind speeds, but should get you close.
use a factor of 1.05 on the windward surfaces and a factor of -1.05 on the leeward surface for any

### RE: Wind Loads on Open Buildings in ASCE-7

(OP)
ajh1,
Thanks, thats a big help.  My email is drrixx@bellsouth.net

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