Minimum Roof Dead Load

When used for storage only dead load of attic floor not floored 10 lbs.

Minimum roof dead load.

Live load on attic floor local requirements. 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. Roofs used for roof gardens or assembly purposes shall be designed for a minimum live load of 100 psf 4 79 kn m 2. Minimum uniformly distributed live loads.

Minimum roof live load is 30psf. Light frame wood roof with wood structural panel sheathing and 1 2 inch gypsum board ceiling 2 psf with asphalt shin. 1 2d 1 0e l 0 2s when h loads are present they shall have 6. Or s or r l or 0 5w dead load d in 1 through 5 and 7.

Ft dead load of roof of wood shingle construction 10 lbs. Design stresses and deflection should be increased by a magnification factor for wood members that are not cambered such as sawn lumber and timbers. L1084 32 abingdon villas page 37 of 70 pringuer james consulting engineers ltd loading for the structure. Roofs used for promenade purposes shall be designed for a minimum live load of 60 psf 2 87 kn m 2.

1 2d 1 0w l 0 5 l r or s or r 5. 0 9d 1 0w a load factor of 1 6 when adding to load 7. Ignore the weight of cladding. Tiles 0 75kn m timber structure 0 25 kn m.

The roof dead load is 32 psf the floor dead load including the partition load is 80 psf and the flat roof snow load is 40 psf. Overturning should also consider roof uplift forces unless a separate load path is designed to transfer those forces. C roof live loads. The design spectral acceleration parameters are s ds 0 28 and s d 1 0 11.

Section 1603 1 1 b any special additional superimposed dead load if applicable. 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.