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Nominal lumber specifications[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: Nominal lumber specifications
- From: "AWC Info" <AWCInfo(--nospam--at)afandpa.org>
- Date: Tue, 6 Apr 2010 15:36:44 -0400
The 1944 NDS® paragraph 200-C discusses net sizes versus nominal sizes: http://www.awc.org/Standards/nds.html#archives
The first Department of Commerce Voluntary Product Standard PS20 for dimension lumber was established in 1970. That was the first recognized “national” standard.
"Buddy" Showalter, P.E.
American Wood Council
19th Street, NW, Suite 800
The American Wood Council (AWC) is the wood products division of the American Forest & Paper Association (AF&PA). AWC develops internationally recognized standards for wood design and construction. Its efforts with building codes and standards, engineering and research, and technology transfer ensure proper application for engineered and traditional wood products.
Subject: Nominal lumber specifications
Does anyone have any information when the "UBC" or other building codes for California 1st started specifying nominal lumber dimensions? For example 1.5" x 3.5" instead of 2" x 4".
We have a project and the architect is saying that nominal lumber began to be used during the 1970's, but I have seen homes in the 50's and 60's framed with nominal lumber and not "rough" dimensions.
Any information would be greatly appreciated
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