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RE: Wood: 'en' and Plywood question.[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Wood: 'en' and Plywood question.
- From: Al Grathwol <AGrathwol(--nospam--at)BoyleEngineering.com>
- Date: Thu, 15 Jul 1999 11:28:41 -0400
> 1) I know this is an elementary, but I want to make sure I > have it right. If > you sheath both sides of the wall using the same nail pattern > (who wouldn't?) > do you reduce the nail capacity in half? I don't know why you would do that. > For example if you have 8d at 6" on the edge on one side, the > capacity per > nail is v*(6/12) per nail. However, if both sides are > sheathed with 8d at 6" > o.c. is the capacity per nail v*(6/24) ? I see no reason to reduce the strength. The nails on one side of the wall don't know that there are nails on the other side! > > 2) What thicknesses of plywood and OSB are commonly used for > shearwalls. I > always specify 15/32" 5-ply (struct I) panels but understand > that some use > 3/8 or 1/2". With all of the choices for plywood's to determine wall > deflections, which panels should I be considering for common > use in all of > the area's of the US (since the program calculates wind loads > as well). The UBC tables specify an allowable shear for various plywood thicknesses.
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