2×12 Douglas Fir Bedroom Floor Joist Span (16" O.C., 30 PSF)
Maximum practical span for residential sleeping areas. Allows for very large bedrooms, bonus rooms, or attic conversions without intermediate support beams.
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Maximum Span21'-9"
Maximum Span261inches
Species & GradeDouglas Fir-Larch #2
Load ConditionLive Load: 30 psf, Dead Load: 10 psf
Deflection LimitLive Load: L/360, Total Load: L/240
Code ReferenceIRC Table R502.3.1
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