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Re: lumber grade reduction

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If you rip a wood member, it does need to be re-graded because the maximum permissible knot size is a function of it's distance from the edge of the member.  The "you have to design it as Grade 3" seems pretty arbitrary to me.
 
Conrad Guymon, P.E.
----- Original Message -----
From: Mark Baker
Sent: Friday, December 07, 2001 11:21 AM
Subject: lumber grade reduction

Just received a plan check comment "if you rip a wood member, beam or joist, you have to design it as Grade 3".
 
Is this true? If so, where is the code language to substantiate it?
 
Thanks,
 
Mark