Floor Load Width

Whether the bearers are supporting load bearing walls or only floor loads the area of the floor supported by an individual bearer must be determined.

Floor load width.

Live load is weight of furniture wind snow and more. Loads should be determined in accordance with this chapter. 1 psf lb f ft 2 47 88 n m 2. Spacing should be interpreted as the centre to centre distance between adjacent parallel members.

Maximum floor joist span for no. 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. If there s wall board covered ceiling suspended from the underside of that floor the dead load increases to about 10 pounds per square foot. 2 grade of douglas fir are indicated below.

This is referred to as the floor load width flw. Dead load is the weight of the structure and any fixed items. 1 ft 0 3048 m. The dead load on a floor is determined by the materials used in the floor s construction.

Maximum span of 2x6 floor joist. Required size for a given span. Live load represents the weight of furniture snow etc. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of.

Dead load weight of structure and fixed loads 10 lbs ft 2. 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. Where the bearer supports load bearing walls the type of roof covering also needs to be determined. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.

If you have any questions you should contact an engineer. This chart is for basic reference only. But larger is not always better when builders are constructing a home or adding a room addition.