Residential Roof Dead Load

Dwellings see residential elevator machine room grating on area of 2 in.

Residential roof dead load.

50 mm by 50 mm. Light frame wood roof with wood structural panel sheathing and 1 2 inch gypsum board ceiling 2 psf with asphalt shingle roofing 3 psf 15 psf. Foot ceiling construction gypsum sheetrock finish 10psf floor construction carpet or vinyl 10 psf hardwood floor 12 psf ceramic tile 15 psf. Unlike the trussed roof live load and dead load of the rafters and ceiling joists must be accounted for as separate systems.

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. When used for storage only dead load of attic floor not floored 10 lbs. Advance residential building design by unifying the current practice of applying design loads improving the level of efficiency in the design effort and promoting cost effective results. The dead load on a roof is the weight of the roof structure itself along with any permanently attached materials or structures on the roof so it must be designed first of all to support itself.

D dead load l live load l r live roof load w wind load s snow load e earthquake load r rainwater load or ice water load t effect of material temperature. The following table provides typical weights dead load self weight for various roofing materials. With tar and gravel. With conventional clay tile roofing.

Dead load weight of roof trusses top chord bottom chord webs weight per lineal foot plf 2x4 2x4 2x4 4 3 2x4 2x8 2x4 5 6 2x6 2x4 2x4 4 8 2x6 2x6 2x4 5 5 2x6 2x6 2x6 6 2 2x6 2x8 2x4 5 9 2x6 2x10 2x4 6 6 2x6 2x10 2x6 7 2 2x8 2x8 2x4 6 6 2x8 2x8 2x6 7 2 2x8 2x10 2x8 8 4 dead load weight of floor trusses. Where possible the values were taken directly from manufacturer technical data sheets and are the actual weights of specific representative products. 3 3 dead loads dead loads consist of the permanent construction material loads comprising the roof floor wall and foundation systems including claddings finishes and fixed equipment. Dead load of roof of wood shingle construction 10 lbs.

The values for dead loads in table 3 2 are for commonly used materials and constructions in light frame residential buildings. Dead loads cont d typical weights of horizontal systems roof construction asphalt shingles 15 psf pounds per sq.