Span calculator for wood joists and rafters also available for the android os.
Max floor joist span 2x6.
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.
2 grade of douglas fir are indicated below.
View joist rafter tables.
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.
Dead load weight of structure and fixed loads 10 lbs ft 2.
Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
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.
Dead load is the weight of the structure and any fixed items.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
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.
1 ft 0 3048 m.
Live load is weight of furniture wind snow and more.
1 psf lb f ft 2 47 88 n m 2.
The larger the deck the larger the joists.
For best results refer to our wood and composite deck joist span table.
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.
While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator.
Live load represents the weight of furniture snow etc.
This chart is for basic reference only.
Maximum floor joist span for no.
These tables can also be used to determine deck joist span.
Also available for the android os.
