Span Options Calculator
for Joists & Rafters

Species Required Horizontal Span ft.   in.

Ctrl-Click to select multiple species
Member Type
Deflection Limit
Spacing (in)
Live Load (psf)
Dead Load (psf)
Exterior Exposure
Wet service conditions?
Incised lumber?



       
Select StructuralNo. 1No. 2
Spruce-Pine-Fir
2x10
2x12
2x12

While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the American Forest & Paper Association nor its members assume any responsibility for any particular design prepared from this on-line Span Calculator. Those using this on-line Span Calculator assume all liability from its use.