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RE: Concrete floor on wood trusses

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IBC 2304.12 does not allow concrete on wood.
I would think that additional long term creep deflection in the wood trusses would become a big problem.
It is also advisable to have treated wood or other isolation whenever concrete or masonry is in contact with wood. With today's corrsion concerns with fasteners and pressure treated wood, how can these be addressed with wood trusses?
Jim K.
-----Original Message-----
From: David Smith [mailto:smith1129(--nospam--at)]
Sent: Tuesday, December 06, 2005 1:50 PM
To: seaint(--nospam--at)
Subject: Concrete floor on wood trusses

I have a prospective client wanting a concrete floor slab poured on wood trusses.  The building will be steel-framed on the perimeter.
I am trying to get him to use steel bar joists rather than wood trusses.  Anyone have some good arguments against this?
Dave Smith
Smith Associates