Lumber Span Floor Joist Span Chart

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.

Lumber span floor joist span chart. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. But the 2015 irc included a new one table r507 5 that will make it easy for deck builders to spec a joist size for a given span and joist spacing. Of bearings and is based on uniformly loaded joists. Span calculator for wood joists and rafters also available for the android os.

1 psf lb f ft 2 47 88 n m 2. 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. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.

Also available for the android os. Live load is weight of furniture wind snow and more. The table includes spans for common lumber species used for deck framing like southern pine douglas fir hem fir redwood western cedar and other species. 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.

The maximum span is measured o c. While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. Effective june 1 2013. The spans are based on simple span joists.

2 lumber grade all joists are bridged sample floor joist span table. View joist rafter tables. Floor joist span tables for various sizes and species of wood. 1 ft 0 3048 m.

The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. Dead load weight of structure and fixed loads 10 lbs ft 2. Table 1 floor joists 30 psf live load 10 psf dead load 360 deflection. Dense elect structural select structural nondense structural no 1 dense no 1 nondense no 2 dense.

The table excerpt above is simply a sample and may not be valid for your region. Maximum floor joist span for no.