Floor Joist Span

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.

Floor joist span.

Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability. Dead load weight of structure and fixed loads 10 lbs ft 2. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Span calculator for wood joists and rafters also available for the android os.

2 grade of douglas fir are indicated below. Continuing on from part 1. Floor joist span tables for various sizes and species of wood. Dead load deflection is limited to l 360 and total load deflection is limited to l 240.

Residential structural design vertical structural forces we were about to start learning about floor joist span tables. 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. The maximum span is measured o c.

1 ft 0 3048 m. Also available for the android os. Joist span and spacing is set by your local building code. Using floor joist span tables.

Maximum floor joist span for no. View joist rafter tables. 1 psf lb f ft 2 47 88 n m 2. The spans are based on simple span joists.

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. 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. Don t worry you won t need to do a lot of calculations in determining the size and placement of the structural framing within your house design.

The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel.