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.

The dead load on a floor is determined by the materials used in the floor s construction. Maximum floor joist span for no. A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot. Calculate the square footage of the room by multiplying the width of the room by its length.

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. 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. 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. Multiply the square footage of the room by 50 to calculate the maximum load of the floor in pounds.

The main floor should have 40 psf bedrooms should have 30 psf and attics should have 15 psf. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. Step 4 determining the live load. Live load is weight of furniture wind snow and more.

Measure the length of the beam with the tape measure and make a note on a piece of paper. 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. Most of the time the length is divided by 360 inches. But larger is not always better when builders are constructing a home or adding a room addition.

1 ft 0 3048 m. Using the most common factors including 16 inches on center between joists you can determine the span. 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. 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.

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. 2 grade of douglas fir are indicated below. The live load will depend according to the floor. The optimum deflection limit on your floor joist is an inch for every 360 inches.

Dead load weight of structure and fixed loads 10 lbs ft 2. 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.