Load Floor Length

However if the attic is intended for storage the attic live load or some portion should also be considered for the design of.

Load floor length.

Calculate the square footage of the room by multiplying the width of the room by its 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. 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. The dead load on a floor is determined by the materials used in the floor s construction.

The live load will depend according to the floor. Maximum floor joist span for no. 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. 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.

1 ft 0 3048 m. 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. Dead load weight of structure and fixed loads 10 lbs ft 2. The optimum deflection limit on your floor joist is an inch for every 360 inches.

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. 2 grade of douglas fir are indicated below. Multiply the square footage of the room by 50 to calculate the maximum load of the floor in pounds.

Using the most common factors including 16 inches on center between joists you can determine the span. 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. Step 4 determining the live load. Measure the length of the beam with the tape measure and make a note on a piece of paper.

Span refers to the length of the i joist. 1 psf lb f ft 2 47 88 n m 2. 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.

The main floor should have 40 psf bedrooms should have 30 psf and attics should have 15 psf. Loads should be determined in accordance with this chapter.