Joist Span Tables
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Joist span tables. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors. Span tables for domestic floor joists to bs 5268 7 1 note. Joist span refers to the measurement covered by the joist between supporting structures such as beams or foundation walls. Easi joist specifier select the joist span and depth.
Span calculator for wood joists and rafters also available for the android os. 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. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Flat apartment floor.
Also available for the android os. Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. The section sizes of the floor joists given in tables 1 and 2 should be regularised or be als or cls to enable floors and ceilings to be level. Tables 1 and 2 in this appendix are derived from a trada technology ltd.
Beam and joist span tables built up wood floor beams supporting one floor in a house maximum spans for uniformly distributed loads species and grade supported built up beam size joist length 3 2x8 4 2x8 3 2x10 4 2x10 3 2x12 4 2x12 8 9 8 11 2 11 10 13 8 13 8 15 10 10 8 8 10 0. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. View joist rafter tables. The following easi joist.
Builders generally use pre calculated tables to tell them appropriate joist spans for each lumber species size and spacing. Select floor or roof type. Publication span tables for solid timber members in floors ceilings and roofs excluding trussed rafter roofs for dwellings. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.