Max Floor Joist Span

Dead load weight of structure and fixed loads 10 lbs ft 2.

Max floor joist span. Floor joist span tables for various sizes and species of wood. While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. Joist span and spacing is set by your local building code.

Span calculator for wood joists and rafters also available for the android os. When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started. 1 psf lb f ft 2 47 88 n m 2. Live load is weight of furniture wind snow and more.

True floor joist span calculations can only be made by a structural engineer or contractor. 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. Also available for the android os. 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.