Floor Joist Span

Live load is weight of furniture wind snow and more.

Floor joist span. 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. Engineered wood products ewp span and size charts for bci joists. Maximum floor joist span for no. 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. Floor joist span tables for various sizes and species of wood. The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. Dead load deflection is limited to l 360 and total load deflection is limited to l 240.

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. For best results refer to our wood and composite deck joist span table. The spans are based on simple span joists. 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.

In typical deck construction with a ledger on one side of the joist and beam on the other the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above. 1 psf lb f ft 2 47 88 n m 2. 2 grade of douglas fir are indicated below. The larger the deck the larger the joists.

The maximum span is measured o c. True floor joist span calculations can only be made by a structural engineer or contractor. View joist rafter tables. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Of bearings and is based on uniformly loaded joists. Also available for the android os. Joist span and spacing is set by your local building code. Span calculator for wood joists and rafters also available for the android os.