2×10 Douglas Fir Floor Joist Span (12" O.C., 40 PSF)
Tighter spacing increases load capacity and reduces deflection. Used for heavy load areas, tile floors, or when extra stiffness is required for long spans.
Results
Maximum Span17'-6"
Maximum Span210inches
Species & GradeDouglas Fir-Larch #2
Load ConditionLive Load: 40 psf, Dead Load: 10 psf
Deflection LimitLive Load: L/360, Total Load: L/240
Code ReferenceIRC Table R502.3.1
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