Wood Floor Joist Span Chart

Our joist span charts are for wood joists with a maximum dead load of 10 pounds per square foot and a live load of 40 pounds per square foot.

Wood floor joist span chart. Span calculator for wood joists and rafters also available for the android os. If you have any questions. 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.

View joist rafter tables. Dead load is the weight of the structure and any fixed items. 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. Also available for the android os.

Live load represents the weight of furniture snow etc. Floor joist span tables for various sizes and species of wood. 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.