Wood species and grade
Southern pine No. 2
Douglas fir-larch No. 2
Hem-fir No. 2
Spruce-pine-fir No. 2
Western cedars No. 2
Joist size
2×6
2×8
2×10
2×12
Spacing
12 in on center
16 in on center
19.2 in on center
24 in on center
Floor use
Living areas (40 psf live)
Bedrooms only (30 psf live)
Living areas with tile or stone (40 + 20 psf dead)
Stiffness
L/360 (code minimum)
L/480 (stiffer, for tile or stone)
Your span to check (optional)
Floor joist span calculator ·
Home Garden Lot