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Re: 3/8" Plywood shear values on metal studs.[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Re: 3/8" Plywood shear values on metal studs.
- From: <Dgmurphy(--nospam--at)aol.com>
- Date: Thu, 23 Jul 1998 22:42:11 EDT
I agree with your comments, but feel field observation needs to be added to the discussion. Actual constructed elements vary greatly from tested assemblies. The most notible aspect of 3/8in. ply shearwall failue in Northridge was that field nailing is often overdriven, breaking the outside ply. In a three ply system, when you've lost one ply due to overnailing and the interior ply is junk, your left with 1/8in of material. In real earthquakes in real construction, this stuff rips apart like paper. For practical reasons, a min. of 5 ply only should be used. D. Murphy
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