Dead load weight of structure and fixed loads 10 lbs ft 2.
2x6 floor board span.
The strength of a given joist board is most dramatically affected by the board s top to bottom width.
Dimensional lumber deck beam span chart.
1 ft 0 3048 m.
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.
The numbers in gray indicate the distance between the support posts.
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.
Live load is weight of furniture wind snow and more.
View joist rafter tables.
We ve included 2x6 2x8 2x10 and 2x12 joist spans and more.
2x6 joists should only be used on ground level decks that do not require and will not provide for any guards.
If you will run decking at an angle you might need to put the joists closer together.
A 2 2x10 can span 10 feet and so on.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
A double 2x12 beam can span 12 feet.
See our complete chart of floor joist size span and spacing requirements before you build.
For upper level decks 2x10 is recommended as the minimum size to use for strong guard post connections.
The width is considerably more important than the thickness of a board.
1 psf lb f ft 2 47 88 n m 2.
If you use 5 4 decking joists must be no farther apart than 16 inches.
Maximum floor joist span for no.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Span calculator for wood joists and rafters also available for the android os.
For conventional guardrail post installation bolted to the side of the framing larger framing will provide more strength in the rails.
2 grade of douglas fir are indicated below.
Again it s important to know your local codes.
