Maximum Span Calculator
for Joists & Rafters

4.XX Users - click here  

Species
Size
Grade
Member Type
Deflection Limit
Spacing (in)
Exterior Exposure
Wet service conditions?

Incised lumber?
Live Load (psf)
Dead Load (psf)



       

The Maximum Horizontal Span is:
4 ft. 8 in.
with a minimum bearing length of 0.37 in. required at each end of the member.

PropertyValue
SpeciesSpruce-Pine-Fir
GradeStud
Size2x4
Modulus of Elasticity (E)1200000 psi
Bending Strength (Fb)1067.34 psi
Bearing Strength (Fcp)425 psi
Shear Strength (Fv)168.75 psi


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.