If you have any questions.
Maximum span for 2x10 floor joist.
1 ft 0 3048 m.
Live load represents the weight of furniture snow etc.
A double 2x12 beam can span 12 feet.
This chart is for basic reference only.
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.
Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
Dead load is the weight of the structure and any fixed items.
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.
Spacing is measured from the center of one joist to the center of the next.
The maximum span distance for 12 inch spacing is greater by as much as 30 percent compared to 24 inch spacing.
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.
Dimensional lumber deck beam span chart.
Live load is weight of furniture wind snow and more.
Maximum floor joist span for no.
The larger the deck the larger the joists.
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.
2 2x10 o i 6 2 2x4 2 2x4 2 2x6 2 2x6 2 2x6 2 2x8 2 2x8 2 2x10 2 2x10 s.
2 grade of douglas fir are indicated below.
Span calculator for wood joists and rafters also available for the android os.
Floor joist table joist size joist spacing maximum span.
Joists that are closer together can support more weight which allows the joists to span a longer distance than joists spaced further apart.
True floor joist span calculations can only be made by a structural engineer or contractor.
Dead load weight of structure and fixed loads 10 lbs ft 2.
1 psf lb f ft 2 47 88 n m 2.
Hem fir 2 joists with a live dead load of 40 10 psf.
A 2x8 up to 12 feet.
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.
Spans in this table were derived from the irc table r502 3 1 2 design criteria.
2x10 to 15 feet and 2x12 to 18 feet.
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.
