Ceiling Joist Attic Loading

Span exceeds 26 feet in length.

Ceiling joist attic loading.

Ceiling joist spans for common lumber species uninhabitable attics with limited storage live load 20 psf l δ 240 check sources for availability of lumber in lengths greater than 20 feet. Steel is so much easier to work with and weighs practically nothing and is straight. Loads should be determined in accordance with this chapter. The dead load on a floor is determined by the materials used in the floor s construction.

Girder load width half joist span live load on roof local requirements for wind and snow. Hopefully the attached pictures provide additional info. 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 wooden joists or beams over your garage help hold your roof in place.

A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot. Standard joist spacing for the installation of attic flooring materials is 16 inches on center oc meaning the distance from the center of one joist to the center of the next joist is 16 inches. Ceiling joist are 2x4. 1 can the joist be cut to make room for the attic ladder.

Live load on attic floor local requirements. Ft dead load of roof of wood shingle construction 10 lbs. Screw the metal joist to the existing wood ceiling joist and to each plate and you have very effectively reduced the load deflection of any stored attic loads for little cost. 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.

Attic ceiling joists with limited storage. The ceiling load may include items like drywall ducts recessed lights bathroom fans and attic insulation. Single story house built in the 1940s. When used for storage only dead load of attic floor not floored 10 lbs.

Most houses attics are built without flooring and are not designed to carry the heavy load of finished space. However in some cases the joists are intentionally built strong enough for the homeowner to later build out the attic. If you have an attic over your garage these joists also bear the load of your attic flooring and any materials you store in the attic. 2 how much weight could the ceiling joist hold.

Unless expressly built so an attic s joists are meant for carrying the load of the ceiling below and related elements collectively known as the dead load. 1 inch 25 4 mm 1 foot 304 8 mm 1 pound per square foot 0 0479kpa. If you need a storage area above your garage strong ceiling joists are necessary to support the added weight.