Floor Joist Load Rating

2 grade of douglas fir are indicated below.

Floor joist load rating.

Dead load weight of structure and fixed loads 10 lbs ft 2. Floor joist span tables for various sizes and species of wood. 1 ft 0 3048 m. 1 psf lb f ft 2 47 88 n m 2.

Live load is weight of furniture wind snow and more. The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example. Weyerhaeuser believes that the tj pro rating system for trus joist tji joists is the most comprehensive indication of floor performance ever developed for wood based assemblies. Structural track usually in the same gauge as the.

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. The span table for a 30 psf live load 10psf dead load floor indicates a required fb value of 1 315 and a minimum e value of 1 800 000. Span calculator for wood joists and rafters also available for the android os. Provide a lightweight low cost rigid floor assembly c joist components provide an economical lightweight alternative to open web trusses bar joists engineered lumber cast in place or hollow core floor assemblies.

Maximum floor joist span for no. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches. In this case your joists are adequate to support a 30 psf live load and 10 psf dead load.

To determine the dead load value for a given floor or roof system the weight of all permanently installed materials in a given component are added together. Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor. Depending on loads and spans c joists are typically spaced at 12 16 19 2 or 24 on center spacing. A uniform load rating on a beam can easily be translated into what an equivalent maximum point load can be.

Location and configuration of heavy loads should be looked at on a case by case basis. For example a floor joist at 16 spacing s that can carry 53 pounds per linear foot would translate into a 318 pound single point load at its center. Unlike stiffness live loads and dead loads are added together to determine minimum design values for strength. We have thoroughly investigated floor performance for floors framed with tji joists and structural composite lumber scl products.