True floor joist span calculations can only be made by a structural engineer or contractor.
Floor joist span 2x12.
Dead load weight of structure and fixed loads 10 lbs ft 2.
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.
Span calculator for wood joists and rafters also available for the android os.
1 ft 0 3048 m.
Floor joist span tables for various sizes and species of wood.
1 psf lb f ft 2 47 88 n m 2.
Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction.
Live load is weight of furniture wind snow and more.
Also available for the android os.
Hem fir 2 joists with a live dead load of 40 10 psf.
See our complete chart of floor joist size span and spacing requirements before you build.
We ve included 2x6 2x8 2x10 and 2x12 joist spans and more.
2 grade of douglas fir are indicated below.
View joist rafter tables.
Maximum floor joist span for no.