Floor Joist Span Table

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.

Floor joist span table. 1 psf lb f ft 2 47 88 n m 2. Of bearings and is based on uniformly loaded joists. Dead load weight of structure and fixed loads 10 lbs ft 2.

The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. These tables can also be used to determine deck joist span. 1 ft 0 3048 m.

Live load is weight of furniture wind snow and more. Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability. 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.

Maximum floor joist span for no. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Builders can adjust their choice of lumber size and spacing depending on circumstances.

2 grade of douglas fir are indicated below. 1 in 25 4 mm. For example in the joist span table below the highlighted cell shows that 2 x 8 southern yellow pine joists that have a grade of 2 and are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.

Reading the table you ll see that 2 x 8s installed 16 apart on center can span 12 4. So our house would look like the picture below with all floor joists 2 x 8. View joist rafter tables.