Floor Joist Span Chart

Of bearings and is based on uniformly loaded joists.

Floor joist span chart.

1 ft 0 3048 m. Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in. 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. 2 grade of douglas fir are indicated below.

Span calculator for wood joists and rafters also available for the android os. Joist span and spacing is set by your local building code. Maximum floor joist span for no. Floor joist span tables for various sizes and species of wood.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. True floor joist span calculations can only be made by a structural engineer or contractor. 1 psf lb f ft 2 47 88 n m 2. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Also available for the android os. The floor joist spacing is the distance between the centers. Sample floor joist span table. The maximum span is measured o c.

The table has two column sections one for joists without a cantilever and one for joists with a cantilever. Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length. When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started.

Live load is weight of furniture wind snow and more. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Looking at this table you will see there is a choice in the size of floor joist 2 x 6 2 x 8 2 x 10 or 2 x 12 and there is a choice in the joist spacing 12 16 or 14. The spans are based on simple span joists.

Dead load weight of structure and fixed loads 10 lbs ft 2. View joist rafter tables.