Span calculator for wood joists and rafters also available for the android os.
Wood floor beam span table.
Tables 7 12.
Sample floor beam span table.
Also available for the android os.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
The full table shows more lumber sizes.
This table is simply a sample and may not be valid for your region.
View joist rafter tables.
It also shows the maximum that the beam can span.
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.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Floor joist span tables for various sizes and species of wood.
This span table excerpt shows two possible sizes of built up floor beams 2 x 10 and 2 x 12.
Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications.