Roof Dead Load

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.

Roof dead load.

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 h hydraulic loads from soil f hydraulic loads from fluids. Thick 1 5 psf dead loads. Live load on attic floor local requirements. Concrete tiles plain 0 75 kn m.

2 2 3 assessment of dead load. Pitched roof measured on plan timber trussed rafters. Overturning should also consider roof uplift forces unless a separate load path is designed to transfer those forces. When used for storage only dead load of attic floor not floored 10 lbs.

Where l r shall not be less than 12 psf and not more than 20 psf. The structure of a roof that supports solar photovoltaic panels or modules shall be designed to accommodate the full solar photovoltaic panels or modules and ballast dead load including concentrated loads from support frames in combination with the loads from section 1607 13 5 1 and other applicable loads. 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. L r l o r 1 r 2.

Where d is floor dead load. Roof live load may be reduced by the following equation. I just looked at a 12 12 pitched roof and if you compensate for the pitch the flat projected dead load is increased by about 25. Pitched roof measured on slope clay tiles plain 0 65 kn m.

Arch 331 note set 13 1 s2014abn 2. Dead load of attic floor when floored 20 lbs. Roof dead load calculation msquared48 structural op 11 aug 09 03 57. Pole barns roof trusses roof material weight roof material dead load table.

Dead load of roof of wood shingle construction 10 lbs. A table of roof material weights including sheathing insulation and other decking. Concrete tiles interlocking 0 45 kn m. R 1 1 for a t less than or equal to 200 psf r 1 1 2 0 001 a t for between 200 psf and 600 psf.

When figuring total vertical loads for gravity or seismic loads does anyone adjust the roof dead loads for the slope of the roof. Roof live load reduction.