Floor Joist Span Deck Span Chart

Deck joists have a different maximum span length depending upon the size spacing and framing material that you re creating your deck with.

Floor joist span deck span chart. The larger the deck the larger the joists. Dimensional lumber deck beam span chart. To learn more about deck joist sizing spacing and allowable span reference this chart. Here s a helpful chart covering the most popular wood framing species and their maximum allowed spans.

Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Section r507 5 notes that deck joists can cantilever up to 1 4 of the joist span. 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. 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.

The numbers in gray indicate the distance between the support posts. 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. 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. Ready to start calculating how much lumber you ll need for your joists.

A 2 2x10 can span 10 feet and so on. 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. A double 2x12 beam can span 12 feet. 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. 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. Span calculator for wood joists and rafters also available for the android os. As a rule the larger the deck the larger the joists.

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. For best results refer to our wood and composite deck joist span table.