2 X 4 Floor Joist Span Table

The 2 4 s and 2 6 s are considered to be in spf 3 stud and the 2 8 s and 2 10 s in spf 1 2.

2 x 4 floor joist span table.

For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine. The lengths and sizes of joists vary depending on the species and quality of the lumber used. 1 psf lb f ft 2 47 88 n m 2. The numbers in gray indicate the distance between the support posts.

Honestly that sounds like a trampoline to me. I can t use a thicker joist because of door threshold clearance. 1 ft 0 3048 m. The spans are based on simple span joists.

I m building a ground level deck with 2 x 4 joists supported by adjustable post bases bison s. Rafter and joist span faq. Live load is weight of furniture wind snow and more. 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.

The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches. 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. 2 grade of douglas fir are indicated below.

A double 2x12 beam can span 12 feet. A 2 2x10 can span 10 feet and so on. Dead load weight of structure and fixed loads 10 lbs ft 2. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

For example in the joist span table below the highlighted cell shows that 2 x 8 southern yellow pine. Dimensional lumber deck beam span chart. These tables can also be used to determine deck joist span. The amc span table table gives me about a 5 6 foot span for a 2 x 4 depending on species live load numbers.

Maximum floor joist span for no. Span calculator for wood joists and rafters also available for the android os. Fire safe construction 3 floor performance and tj pro rating 4 5 section 1. True floor joist span calculations can only be made by a structural engineer or contractor.

View joist rafter tables.