Wood Truss spacing
Wood Truss spacing
(OP)
I am desiging a chalet to be built in Pigeon Forge, TN with an "A" frame roof truss built out of heavy members. Building width is 26'. Roof deck is 2x T&G on top of the top chord. What is the maximum truss spacing and minimum member size?





RE: Wood Truss spacing
You did not specify the wood species, so i assumed SYP.
The T&G pine commercial Sy=1400 psi
Typical spacing typically is 32" or 36", with deflection and creep the design drivers.
Design the Rafters – 20 psf live load, 10 psf dead load, 240 deflection, CD = 1.15 no drywall
Cheers
RE: Wood Truss spacing
RE: Wood Truss spacing
Usually it is helpfull to post new questions on there own.
What area loads the beam?
Will the roof load up or pass any load to the beam?
Is the an adequate foundation to support the beam loading?
You did not specify the wood species, so i assume SYP.
For SYP beams 17' long usually 2-2x12s deflection is too much.
Use 30 psf live load, 10 psf dead load, 360/L deflection for Sleeping Rooms and Attic Floors