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RE: OSB sheathing exposed to weather

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Dennis,
 
The PFS Research Foundation publishes a guide called "OSB Design & Construction Guide" that has info on grades & durability of OSB.  Here's a link to the report:
 
http://www.pfsrf.org/prf/pdf/OSBGuide1.pdf
 
They have other design and construction guides that are helpful as well.
 
HTH,
Dave Adams, S.E.
Lane Engineers, Inc.
Tulare, CA
(559) 688-5263
 
 
 
-----Original Message-----
From: LSFORDHLA(--nospam--at)aol.com [mailto:LSFORDHLA(--nospam--at)aol.com]
Sent: Tuesday, July 15, 2003 3:31 PM
To: seaint(--nospam--at)seaint.org
Subject: OSB sheathing exposed to weather

The construction progress of one of our wood framing projects in Southern California has been stopped for over 2 years. Recently it started again, the framing had been completed and left exposed for over two years.

Though visually the OSB boards look fine with no swells or delaminations, there are rust stains from nail heads. Does anyone feel there should be concerns over the integrity of the unprotected framing from the environment (2 blocks from the ocean), particularly the exterior OSB sheathings rust stains?

Dennis Shoup