Flooring Joist Span Tables

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

Flooring joist span tables. Residential structural design vertical structural forces we were about to start learning about floor joist span tables. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Builders generally use pre calculated tables to tell them appropriate joist spans for each lumber species size and spacing. 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. For the bird s mouth roof joist bearing detail. Span tables for domestic floor joists to bs 5268 7 1 note. Low pitch 6 12 or less 14 15.

True floor joist span calculations can only be made by a structural engineer or contractor. Dead load weight of structure and fixed loads 10 lbs ft 2. But local building codes should always be consulted since unusual situations may call for different span recommendations. Spans of timber joists in suspended timber ground floors span tables.

Span calculator for wood joists and rafters also available for the android os. Continuing on from part 1. Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. Floor joist span tables for various sizes and species of wood.

Using floor joist span tables. 1 psf lb f ft 2 47 88 n m 2. View joist rafter tables. 2 grade of douglas fir are indicated below.

Other span tables are based on the guidance given in bs 5268 7 1 which is a uniformly distributed load of 1 5kn m for spans greater than. The floor joist span tables are based on the loadings given in the amended version of bs 6399 1 which is an imposed load of either a uniformly distributed load of 1 5 kn m or a concentrated load of 1 4 kn. 1 ft 0 3048 m. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance.

Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors. Floor joist span tables for surveyors floor construction. Live load is weight of furniture wind snow and more. Web stiffeners shall be cut to fit between the flanges of the lp solidstart i joist leaving a minimum 1 8 gap 1 maximum.