View joist rafter tables.
2x6 floor board span.
If you use 5 4 decking joists must be no farther apart than 16 inches.
2 grade of douglas fir are indicated below.
Live load is weight of furniture wind snow and more.
Dead load weight of structure and fixed loads 10 lbs ft 2.
Dimensional lumber deck beam span chart.
Maximum floor joist span for no.
Again it s important to know your local codes.
Also available for the android os.
The width is considerably more important than the thickness of a board.
Decking made of 2x4s or 2x6s can span up to 24 inches.
Span calculator for wood joists and rafters also available for the android os.
If you will run decking at an angle you might need to put the joists closer together.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Decking boards span from joist to joist.
1 psf lb f ft 2 47 88 n m 2.
A double 2x12 beam can span 12 feet.
A 2 2x10 can span 10 feet and so on.
For example a joist made from doubled 2 x 6s can span a distance about 25 percent more than a single 2 x 6 but a 2 x 12 can span about 80 percent more than a 2 x 6 even.
For upper level decks 2x10 is recommended as the minimum size to use for strong guard post connections.
See our complete chart of floor joist size span and spacing requirements before you build.
We ve included 2x6 2x8 2x10 and 2x12 joist spans and more.
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.
The strength of a given joist board is most dramatically affected by the board s top to bottom width.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
The numbers in gray indicate the distance between the support posts.