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A 2 2x10 can span 10 feet and so on.
Wood deck joist span tables. Framing span tables for all types of wood construction not just decks are given separately at framing tables spans where in addition to span tables for dimension lumber timbers we also give a rough rule of thumb that gives the span for a common 2x joist. Joist and rafter span tables. As a rule the larger the deck the larger the joists. A double 2x12 beam can span 12 feet.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. These tables can also be used to determine deck joist span. Joists rafters simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. But the 2015 irc included a new one table r507 5 that will make it easy for deck builders to spec a joist size for a given span and joist spacing.
The larger the deck the larger the joists. Span calculator for wood joists and rafters also available for the android os. Ready to start calculating how much lumber you ll need for your joists. To learn more about deck joist sizing spacing and allowable span reference this chart.
The table includes spans for common lumber species used for deck framing like southern pine douglas fir hem fir redwood western cedar and other species. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. A 2x8 up to 12 feet. 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.
View joist rafter tables. 2x10 to 15 feet and 2x12 to 18 feet. In 2019 they published revision 1. 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.
Dimensional lumber deck beam span chart the numbers in gray indicate the distance between the support posts. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. The canadian wood council cwc deck span tables 2016 finally in the spring of 2016 the cwc published deck span tables and put them on the web for free in the form of a pdf.
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