Deck Floor Joist Span Chart

The larger the deck the larger the joists.

Deck floor joist span chart. View joist rafter tables. The maximum joist spacing you can use will depend on the size and allowable span of your joists. Deck joists are typically spaced either every 12 inches or 16 inches on center. Deck joists have a different maximum span length depending upon the size spacing and framing material that you re creating your.

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. What s the maximum deck joist span. 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. Deck beam span table deck joist span table deck joist rule of thumb deck porch construction structural fasteners deck porch post beam connectors.

As a rule the larger the deck the larger the joists. To learn more about deck joist sizing spacing and allowable span reference this chart. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Floor joist span tables for various sizes and species of wood.

Section r507 5 notes that deck joists can cantilever up to 1 4 of the 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. 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. But you ll notice when you look at the portion of the span table for joists with cantilevers that the joist span for decks with a cantilever is often less than the span for the same sized joist without cantilevers.

Ready to start calculating how much lumber you ll need for your joists. Also available for the android os. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Span calculator for wood joists and rafters also available for the android os.

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. The spans of joists varies based upon several factors. 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.