Structural Beam Calculator
Structural Beam
Calculate the maximum load capacity and deflection of a structural beam based on material and dimensions
feet
inches
inches
Formula
Max Load = (8 x Allowable Stress x Section Modulus) / Span Length
Frequently Asked Questions
How do I calculate beam load capacity?
Beam load capacity depends on the material strength, cross-section dimensions, and span length. The section modulus and allowable stress determine the maximum bending moment.
What is the L/360 deflection rule?
The L/360 rule limits beam deflection to the span length divided by 360. For a 12-foot beam that means a maximum deflection of 0.4 inches.
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