Wood Beam Design Calculator
Check bending adequacy of wood beams per NDS ASD: compare actual bending stress against adjusted allowable stress.
Inputs
m
kN/m
mm
mm
Results
Maximum Moment
10 kN·m
Actual Bending Stress (fb)
12.21 MPa
Adequate?
0 (1=yes, 0=no)
Required Bending Stress12.21 MPa
Adjusted Allowable (F'b)10 MPa
How to Use This Calculator
- Enter the beam span in feet and the tributary width.
- Input the dead load, live load, and any point loads in lbs or psf.
- Set the wood species, grade, and moisture condition.
- Review the Required Section Modulus, Recommended Lumber Size, and the Deflection Check.
- Apply size adjustment factors and verify shear capacity at the supports.
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Deflection Checker Calculator
Check beam deflection against code limits (L/240, L/360, L/480, L/600) using δ = 5wL⁴/(384EI).
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