Hem fir 2 joists with a live dead load of 40 10 psf.
Maximum floor joist span for 2x10.
A double 2x12 beam can span 12 feet.
2x10 to 15 feet and 2x12 to 18 feet.
2 2x10 o i 6 2 2x4 2 2x4 2 2x6 2 2x6 2 2x6 2 2x8 2 2x8 2 2x10 2 2x10 s.
The larger the deck the larger the joists.
Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
The maximum span distance for 12 inch spacing is greater by as much as 30 percent compared to 24 inch spacing.
Spans in this table were derived from the irc table r502 3 1 2 design criteria.
Spacing is measured from the center of one joist to the center of the next.
2 grade of douglas fir are indicated below.
The illustrations one for cantilever joists and one for flush rim beam hung joists point out where joist span measurements are taken from the saddle of the ledger mounted joist hanger to the center of a dropped beam or saddle of the.
Live load is weight of furniture wind snow and more.
This chart is for basic reference only.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Floor joist table joist size joist spacing maximum span.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Dead load weight of structure and fixed loads 10 lbs ft 2.
Maximum floor joist span for no.
The numbers in gray indicate the distance between the support posts.
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.
A 2 2x10 can span 10 feet and so on.
Joists that are closer together can support more weight which allows the joists to span a longer distance than joists spaced further apart.
Our joist span charts are for wood joists with a maximum dead load of 10 pounds per square foot and a live load of 40 pounds per square foot.
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.
In typical deck construction with a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above.
These tables can also be used to determine deck joist span.
1 ft 0 3048 m.
View joist rafter tables.
Dimensional lumber deck beam span chart.
If you have any questions.
1 psf lb f ft 2 47 88 n m 2.
Dead load is the weight of the structure and any fixed items.
A 2x8 up to 12 feet.
