2 X 4 Floor Joist Span Table

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

2 x 4 floor joist span table. I m building a ground level deck with 2 x 4 joists supported by adjustable post bases bison s. 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. A 2 2x10 can span 10 feet and so on. I can t use a thicker joist because of door threshold clearance.

True floor joist span calculations can only be made by a structural engineer or contractor. The numbers in gray indicate the distance between the support posts. The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. 1 psf lb f ft 2 47 88 n m 2.

The lengths and sizes of joists vary depending on the species and quality of the lumber used. Live load is weight of furniture wind snow and more. 9 16 tji joists design properties 6 floor span and load tables 7 8 tips for preventing floor noise 8 allowable holes 9 cantilevers 10 11 roof span and load tables 12 13 framing connectors 14 15 section 2. A double 2x12 beam can span 12 feet.

Maximum floor joist span for no. 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. The amc span table table gives me about a 5 6 foot span for a 2 x 4 depending on species live load numbers.

View joist rafter tables. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. 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 spans are based on simple span joists.

For example in the joist span table below the highlighted cell shows that 2 x 8 southern yellow pine. Dead load weight of structure and fixed loads 10 lbs ft 2. 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. Honestly that sounds like a trampoline to me.

Fire safe construction 3 floor performance and tj pro rating 4 5 section 1. Also available for the android os. 2 grade of douglas fir are indicated below. These tables can also be used to determine deck joist span.

Dimensional lumber deck beam span chart.