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