What Does Floor Load Width Mean

Floor joists support structural load and require lumber species capable of supporting those loads. The requirement to design a floor for a uniform load of 50 psf over the entire area for a particular member does not mean that this is the largest load that can be placed on the floor. This is the fourth video in the series on the timber framing code.

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The dead load on a floor is determined by the materials used in the floor s construction.

What does floor load width mean.

The live load of a floor. Lineman standing on one leg will fall through the floor. A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot. 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.

Assume that the floor system must support its own weight of 40 psf dead load and a live load of 100 psf. This video looks at floor load width flw. In other words the weight is distributed or shared uniformly by the members in the floor or roof system. It does not mean that a 300 lb.

Flw is used to calculate the sectional size of. What is the column load for column b3. Total floor load 40 100 140psf column load tributary area total floor load 2 2 1b ft 360 ft 140 50 400 lb. Floor load definition is the load that a floor as of a building may be expected to carry safely if uniformly distributed usually calculated in pounds per square foot of area.

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. Joist spacing common joist spacings for 2 by 10 joists and other dimensional lumber sizes are 12 16 and 24 inches. The load is an average value for a typical office space with desks filing cabinets aisles etc. As can be seen by the concentrated load requirement the 2 000.

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. Two species used for structural lumber include douglas fir and southern yellow pine. For the most part live load and dead load values for floor and roof systems are considered distributed loads. A uniform load rating on a beam can easily be translated into what an equivalent maximum point load can be.

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. But larger is not always better when builders are constructing a home or adding a room addition. In order to establish proper sizes grades and on center spacing of joists and rafters you first need to determine what loading. Joists that are closer together can support.