Floor Joist Span Table

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

Floor joist span table.

Dead load weight of structure and fixed loads 10 lbs ft 2. View joist rafter tables. Residential structural design vertical structural forces we were about to start learning about floor joist span tables. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Using floor joist span tables. Maximum floor joist span for no. 1 psf lb f ft 2 47 88 n m 2. Continuing on from part 1.

Live load is weight of furniture wind snow and more. 1 ft 0 3048 m. 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. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. 2 grade of douglas fir are indicated below. 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. Floor joist span tables for various sizes and species of wood.

Span calculator for wood joists and rafters also available for the android os.