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RE: 1 1/8" sht'g. diaphragm values

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Diaphragm table in building code states "minimum nominal panel thickness" (and requires minimum nail penetration).  So, for 1-1/8" sheathing, use either 15/32" Str. I numbers or 19/32 sheathing numbers (turns out they are the same numbers).  And make sure nail is long enough to provide 1-1/2" penetration (1-5/8" for older building codes).

Thomas D. Skaggs, Ph.D., P.E.
Senior Engineer
APA - The Engineered Wood Association
7011 S. 19th Street
Tacoma, WA 98466
ph: 253/565-6600
fx: 253/620-7235

From: Mark D. Baker [mailto:shake4bake(--nospam--at)]
Sent: Thursday, April 29, 2004 14:13
To: seaint(--nospam--at)
Subject: 1 1/8" sht'g. diaphragm values

Can anyone direct me to diaphragm shear values for 1 1/8" sht'g.?


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