Joist and rafter span tables.
Timber floor joist span tables.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Straight line interpolation shall be permitted for intermediate spans and design values.
These tables can also be used to determine deck joist span.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
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.
View joist rafter tables.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
These span tables assume installation of at least three joists or rafters that are spaced not more than 24 on center.