For best results refer to our wood and composite deck joist span table.
Floor joist span deck span chart.
Floor joist span tables for various sizes and species of wood.
Span calculator for wood joists and rafters also available for the android os.
Plus unlike floor joists decks needs to be able to support the extra weight of pressure treated wood handrails as well as snowfall during winter.
Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span.
Steel post cap connectors plywood post to beam cleats other connectors deck porch railings code requirements safety deck framing tables codes specifications questions answers about allowable spans for deck floor or porch framing.
Also available for the android os.
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.
Deck beam span table deck joist span table deck joist rule of thumb deck porch construction structural fasteners deck porch post beam connectors.
Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope.
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.
Section r507 5 notes that deck joists can cantilever up to 1 4 of the joist span.
A double 2x12 beam can span 12 feet.
A 2 2x10 can span 10 feet and so on.
As a rule the larger the deck the larger the joists.
The deck joist span chart below is based on the updated codes from the international residential code 2015 which for the first time specifically addressed these deck design considerations.
To learn more about deck joist sizing spacing and allowable span reference this chart.
Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.
Deck joists have a different maximum span length depending upon the size spacing and framing material that you re creating your deck with.
For example joists spaced 16 inches from the center of the joist next to it can span 1 5 times in feet the depth of their inches.
Ready to start calculating how much lumber you ll need for your joists.
The numbers in gray indicate the distance between the support posts.
Here s a helpful chart covering the most popular wood framing species and their maximum allowed spans.
