Maximum Floor Joist Span Calculator

The lowest is a plain ceiling joist with no storage 10 pounds per square foot.

Maximum floor joist span calculator.

Select the on center spacing for the joists. While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. View joist rafter tables. The highest is a fully loaded floor 70 pounds per square foot.

1 psf lb f ft 2 47 88 n m 2. Species southern pine douglas fir larch hem fir spruce pine fir redwood western cedars ponderosa pine red pine. Use the joist span and spacing calculator below to plug in your desired type of wood the size of your joists and the required spacing between each joist. Span calculator for wood joists and rafters also available for the android os.

Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span. Live load is weight of furniture wind snow and more. This is how far apart they will be. There are six choices.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. 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. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Dead load weight of structure and fixed loads 10 lbs ft 2. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. 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. Maximum floor joist span for no.

Floor joist span calculator to use the joist span calculator below first select the species of lumber you will use for your construction project from the drop down list. 1 ft 0 3048 m. Also available for the android os.