Structural Engineering: RE: RE Plywood Shear wall

Not comparing PWD with OSB, but CDX with Struct I, forget the emotion. Do a
deflection calculation using the Gt of CDX vs. Struct I then decide for
yourself.

T. William (Bill) Allen, S.E.
ALLEN DESIGNS
Consulting Structural Engineers
V (949) 248-8588 . F(949) 209-2509

-----Original Message-----
From: Tim Rudolph [mailto:timrudolph@att.net]
Sent: Thursday, April 16, 2009 11:47 AM
To: seaint@seaint.org
Subject: RE Plywood Shear wall

Hi,
other than the specifics of the code language --is there a compelling
reason for the Structural 1 plywood over OSB. - availability is a good
reason are there others? the sentence could start with "I feel........
about plywood." :-) or OSB.

Thanks,
Tim Rudolph
Bishop CA

Hi,
I have designed an addition to my local volunteer fire department
building. It is an essential facility - I called for 5 ply Structural 1
plywood for the shear walls and plywood for the roof diaphragm. The
contractor would like to substitute OSB for the plywood(OSB is
cheaper). In custom homes and commercial buildings it has not been a
problem to allow the change. But with the Essential Facility Structure
is plywood what should be used over OSB?

Or rephrased what would OSHPOD want- in a hospital building?

I know about OSB and a slightly different /stiffer interaction at the
wood nail interface

Thanks,
Tim Rudolph PE
Bishop CA

Hanging out in Digest mode

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