Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Max span for 2x10 floor joist.
View joist rafter tables.
A 2x8 up to 12 feet.
The maximum span distance for 12 inch spacing is greater by as much as 30 percent compared to 24 inch spacing.
The larger the deck the larger the joists.
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.
Maximum floor joist span for no.
Additionally the load that the floor needs to support is also a consideration.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
If you have any questions.
Live load represents the weight of furniture snow etc.
Joists that are closer together can support more weight which allows the joists to span a longer distance than joists spaced further apart.
Spacing is measured from the center of one joist to the center of the next.
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.
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.
This chart is for basic reference only.
One must take into consideration the spacing of the joists and type of wood used.
Also available for the android os.
2 grade of douglas fir are indicated below.
Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
2x10 to 15 feet and 2x12 to 18 feet.
Span calculator for wood joists and rafters also available for the android os.
Dead load is the weight of the structure and any fixed items.
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.
The maximum span for a 2 x 10 floor joist is up to 21 feet depending on several factors.
Dead load weight of structure and fixed loads 10 lbs ft 2.
Live load is weight of furniture wind snow and more.
These tables can also be used to determine deck joist span.
1 psf lb f ft 2 47 88 n m 2.
