Wood beams in elevated temperatures
Wood beams in elevated temperatures
(OP)
I am designing a roof with a 24' span using 4x15 beams (nominal-3-1/2" x 14" actual dimensions). The beams are exposed to elevated temperatures 100-120 deg F throughout the entire year.
Which wood product is the best for elevated temperatures: Parallam (PSL), Glulam or regular sawn lumber?
Any thoughts welcome, Thank You
Which wood product is the best for elevated temperatures: Parallam (PSL), Glulam or regular sawn lumber?
Any thoughts welcome, Thank You






RE: Wood beams in elevated temperatures
The wood will dessicate, will become more brittle, and lose some of its toughness...
Dik
RE: Wood beams in elevated temperatures
Ct needs to be applied to for this temp range -see table 2.3.3 (NDS 2005 ed). Generally all get the same treatment of the adjustment factor to all your proposed material and I don't think I could say that one will perform better at this temp range better than the other. At that span though I would expect you to get better mileage out of EWP than sawn lumber. If exposed for visual effects then that changes the equation. It all depends on what you need it to be.
MAP
RE: Wood beams in elevated temperatures
RE: Wood beams in elevated temperatures
Under sustained load with elevated temperatures, plastic will creep. So I wonder about the Parallams, not so much the Glulams or solid sticks.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com