Roof Dead Load

The unit weight of commonly used building materials are given in the code is 875 part i 1987.

Roof dead load.

Where snow isn t a problem the. Load limits on the roof of a building dead loads. 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. Ft dead load of roof of wood shingle construction 10 lbs.

Shingles and paper 2 5 psf without ceiling 1 0 psf 2 15 lb. Dead loads dead loads are static forces that are relatively constant for an extended time. Dead loads consist of the permanent construction material loads comprising the roof floor wall and foundation systems including claddings finishes and fixed equipment. Gypsum board 2 0 psf 5 8 in.

Live load on attic floor local requirements. Minimum design dead load can be found in asce 7 table c3 1. Dead loads includes the self weight of walls floors beams columns etc. Of ceiling 1 5 psf 3 15 lb.

The values for dead loads in table 3 2 are for commonly used materials and constructions in light frame residential buildings. 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 possible the values were taken directly from manufacturer technical data sheets and are the actual weights of specific representative products. The following table provides typical weights dead load self weight for various roofing materials.

And 1 90 lb 1 7 psf with ceiling be sure to add wt. 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. And also the permanent fixtures present in the structure. Dead loads are the permanent loads which are always present.

Remember these loads are distributed uniformly over the entire surface of the roof. Joist span bridging girder load width half joist span live load on roof local requirements for wind and snow. Usually the weight of materials plus immovable fixtures such as carpet roof and etc. The live load on a roof is the weight of any temporary objects on the roof.

Building materials are not dead loads until constructed in permanent position. The dead load on a roof is the weight of the roof structure itself along with any permanently attached. Dead loads depends upon the unit weight of the material.