deflection of wood members
deflection of wood members
(OP)
The IRC sets deflection limits for wood members under live loads. Are there any limits for immediate dead load deflection and creep?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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deflection of wood members
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RE: deflection of wood members
RE: deflection of wood members
RE: deflection of wood members
The normal values I use for Residences are L/360 for live loads only, and L/240 for dead plus live. In other structures, those are reduced to L/240 and L/180 respectively. Some are as low as L/180 and L/120.
When you have tile or ceramic flooring, you may want to consider the live load deflection at L/600 or L/1000, with the dead plus live load at 2/3 (or 1.5X depending how you view it) of those values.
For cambers, I normally spec 1.5X the dead load deflection.
Mike McCann
MMC Engineering
RE: deflection of wood members
RE: deflection of wood members
Mike McCann
MMC Engineering
RE: deflection of wood members
RE: deflection of wood members
I would say it's highly unlikely that creep won't occur with timber beams.
Australian codes assume 100% creep for seasoned timber, 200% if it's green.