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Wood Beam Span Calculator
Calculate recommended dimensional lumber sizes and span capacities
Span Standard: Maximum allowable span and sizing depend on clear span length, design live load (psf), and lumber species grade per IRC building code span tables.
Span Length & Load Parameters
Calculation Results
⚠️ Wood span estimates are for general guidance based on standard residential loading ($40\text{ psf}$ live load + $10\text{ psf}$ dead load). Always consult structural span tables or an engineer for load-bearing roof/floor beams.