Roof Joist Span Table

These 46 tables are based upon design values for visually graded southern pine dimension lumber that became effective june 1 2013.

Roof joist span table.

Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. If this is the case with your structure use the floor joist table to determine maximum joist length load. 1 inch 25 4 mm 1 foot 304 8 mm 1 pound per square foot 0 0479kpa. Span calculator for wood joists and rafters also available for the android os.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Table r802 4 1 ceiling joist spans for common lumber species uninhabitable attics without storage live load 10 psf l δ 240 check sources for availability of lumber in lengths greater than 20 feet. View joist rafter tables.

Joist and rafter span tables. 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.