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Re: Plywood Shear Walls On Metal Stud Framing

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The limitation for the thickness of the studs has to do with the failure mode 
of the shear wall when they tested it.  They tested the plywood shear wall 
with 16 ga. studs and #8 screws.  The results showed a failure mode of the 
screws fracturing unlike other walls that were tested with 18 ga. studs which 
had failure modes in the steel framing itself.  There is a report describing 
the results of the tests through AISI.

I hope this helps.

Michelle Kam-Biron   


In a message dated 9/9/99 8:47:38 AM Pacific Daylight Time, skarin(--nospam--at)hninc.com 
writes:

<< Does anyone have any background information on UBC Section 2220.3? This
 section essentially limits the gauge of metal stud framing at plywood shear
 walls to 20 Ga. I suspect the limitation might have something to do with a
 tested assembly.
  >>