Wood Attic Dead Load

Live load on attic floor local requirements.

Wood attic dead load.

C determine the total load and proper load duration. 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. A typical wood frame floor covered with carpet or vinyl flooring has a dead load of about 8 pounds per square foot.

Attic joists for live loads attic joists that are made from 2x8s may be acceptable for building your attic floor but because every room is variable there are no absolutes. Dead load of roof of wood shingle construction 10 lbs. Since it is possible to use the attic for storage the live load of the attic floor is set at 20 psf according to code. Loads should be determined in accordance with this chapter.

As a result the live load dead load and distribution of forces are different. Analysis of an attic truss requires multiple load cases with multiple duration factors. Dead load of attic floor when floored 20 lbs. Flooring for dead loads may not be sufficient for live loads the loads created by people and the features of living space.

This type of truss carries a combination of roof l r or s and floor l loading in addition to the standard top and bottom chord dead loads. Unlike the trussed roof live load and dead load of the rafters and ceiling joists must be accounted for as separate systems. A the top and bottom chord dead load. The truss shown below is known as an attic truss or a room in attic truss.

When used for storage only dead load of attic floor not floored 10 lbs. B the top chord live include snow load as a live load and bottom chord live load.