I Joist Wood I Beam Span Table

Span tables for joists and rafters 3 american wood council table 9 1 required compression perpendicular to grain design values f c in pounds per square inch for simple span joists and rafters with uniform load.

I joist wood i beam span table.

Span ft 1 5 2 0 2 5 3 0 3 5 2 30 22 18 15 13 4 59 44 36 30 25 6 89 67 53 44 38 8 119 89 71 59 51 10 148 111. In contrast wood i beam joists are more stable by design. The wide flange helps reduce vibration creating a firmer feeling floor. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability. Floor joist span tables for various sizes and species of wood. Wood i beam joists are produced at a lower mois ture content thereby minimizing the effects of shrinking twisting and warping.

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.