Load Floor Length

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.

Load floor length. A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot. The optimum deflection limit on your floor joist is an inch for every 360 inches. Step 4 determining the live load. The main floor should have 40 psf bedrooms should have 30 psf and attics should have 15 psf.

The live load will depend according to the floor. 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. 2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes. 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.

The l 480 table with a 40 per square foot live load and a 20 per square foot dead load with a depth of 11 7 8 inches will give you spans according to joint weight. 1 ft 0 3048 m. Dead load weight of structure and fixed loads 10 lbs ft 2. Most of the time the length is divided by 360 inches.

The dead load on a floor is determined by the materials used in the floor s construction. Using the most common factors including 16 inches on center between joists you can determine the span. Maximum floor joist span for no. For a floor system you can find the individual weights of drywall strapping floor joists subfloor underlayment and carpet in an architectural handbook like architectural graphic standards.

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. 1 psf lb f ft 2 47 88 n m 2. Loads should be determined in accordance with this chapter. 2 grade of douglas fir are indicated below.

However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. Live load is weight of furniture wind snow and more. For a floor system you can find the individual weights of drywall strapping floor joists subfloor underlayment and carpet in an architectural handbook like architectural graphic standards. Measure the length of the beam with the tape measure and make a note on a piece of paper.

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. But larger is not always better when builders are constructing a home or adding a room addition.