stresses in wood

huangyhg

stresses in wood
i am having to check the strength of a mezzanine floor built of 2x8 beams, 3/4 ply and 2x4 posts.
does anyone have tensile stress etc info for spruce and pine?
is there a standard floor load or safety factor i should aim at?
makes a change from the usual financial engineering i am cursed to.
cheers
a few thoughts:
in addition to jheidt2543 post,
mezzanine floors for commercial should be engineered to 100 psf live load (in addition to 15 psf dead load). for residential it is 40 psf live load except balconies(balconies in residential is 60 psf).
erv - please clarify the 100 psf live load - in the u.s. the live load is based on occupancy so a mezzanine used for office space would have a live load of 50 psf (with 20 psf  more for partitions) and a mezzanine used for light storage would be 125 psf.
100 psf is for public assembly, exits, etc.
i assumed it was a mezzanine for public assembly, sorry, but none specified. office space may also have 100 psf for file cabinet area (i have run into this recently).