Maker & Reference
Beam Deflection Calculator
Deflection from a point or distributed load on a wood/steel beam. Useful for shelving, joist sizing, and load checks.
Max deflection (in)
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- L/240 limit
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- L/360 limit
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- Pass?
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FAQ
Typical E values? +
Steel = 29,000 ksi. Aluminum = 10,000 ksi. Douglas-fir = 1,600 ksi. Southern pine = 1,500 ksi. LVL = 1,800-2,000 ksi.
L/240 vs L/360? +
L/240 is acceptable for floors, L/360 for ceilings + plaster (more rigid). L/180 is OK for roofs.