Roof Dead Load

Minimum design dead load can be found in asce 7 table c3 1.

Roof dead load.

Load limits on the roof of a building dead loads. Dead loads dead loads are static forces that are relatively constant for an extended time. Joist span bridging girder load width half joist span live load on roof local requirements for wind and snow. And also the permanent fixtures present in the structure.

The values for dead loads in table 3 2 are for commonly used materials and constructions in light frame residential buildings. Dead loads includes the self weight of walls floors beams columns etc. And 1 90 lb 1 7 psf with ceiling be sure to add wt. Dead loads are the permanent loads which are always present.

Dead loads consist of the permanent construction material loads comprising the roof floor wall and foundation systems including claddings finishes and fixed equipment. Roof material dead load table. Ft dead load of roof of wood shingle construction 10 lbs. The live load on a roof is the weight of any temporary objects on the roof.

Shingles and paper 2 5 psf without ceiling 1 0 psf 2 15 lb. And 1 90 lb 2 2 psf 3 ply and gravel 5 6 psf ceiling 4 ply and gravel 6 0 psf acoustical fiber tile 1 0 psf roof sheathing 1 2 in. Live load on attic floor local requirements. Building materials are not dead loads until constructed in permanent position.

Dead loads in short the dead load of a structure comprises its completed weight usually measured in pounds per square foot before it goes into service. The dead load on a roof is the weight of the roof structure itself along with any permanently attached. The floors walls roof columns stairs permanent equipment and any fixed decor constitute a static load that normally doesn t change over the life of the building. Remember these loads are distributed uniformly over the entire surface of the roof.

The following table provides typical weights dead load self weight for various roofing materials. Gypsum board 2 0 psf 5 8 in. Here each square foot of roof system delivers 50 pounds of live load and 15 pounds of dead load 65 psf total to the structural support system. Usually the weight of materials plus immovable fixtures such as carpet roof and etc.

In a few cases the weights we give were calculated using more general manufacturer data or taken from a non manufacturer source that we consider reasonably authoritative. Where snow isn t a problem the. Where possible the values were taken directly from manufacturer technical data sheets and are the actual weights of specific representative products.