Maximum floor joist span for no.
2x12 floor joist span chart.
See our complete chart of floor joist size span and spacing requirements before you build.
Also available for the android os.
Hem fir 2 joists with a live dead load of 40 10 psf.
1 ft 0 3048 m.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
We ve included 2x6 2x8 2x10 and 2x12 joist spans and more.
Spans in this table were derived from the irc table r502 3 1 2 design criteria.
View joist rafter tables.
Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span.
Floor joist span tables for various sizes and species of wood.
Span calculator for wood joists and rafters also available for the android os.
2 grade of douglas fir are indicated below.
1 psf lb f ft 2 47 88 n m 2.