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RE: R Value for Wood Brace

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The wood folks did not do the testing and could not validate concentric braced frames or connections in wood for seismic resistance so the wood OMF went away some years ago. Basically they are not allowed as far as the building code is concerned. That is why there is no R value and no provisions for the wood OMF.

Harold Sprague

From: "Hood, Matthew O." <HoodMO(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: <seaint(--nospam--at)>
Subject: R Value for Wood Brace
Date: Wed, 9 Jun 2004 14:31:06 -0800

Does anyone know why there is no R value listed for wood braces in the
IBC? I know that in the UBC heavy timber braces had an R of 5.6, but for
some reason this has been removed under the IBC. What do you think a
reasonable value would be?


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