Roof Slate Roof Dead Load

Roof will not be available when an applicant applies for a reroofing permit years in the future.

Roof slate roof dead load.

Dead load of attic floor when floored 20 lbs. Overturning should also consider roof uplift forces unless a separate load path is designed to transfer those forces. When a roof is designed using only a minimum 4 psf roof material dead load it will be our policy. Popular pages pole framing post connection post embedment post frame foundations rafter installation pole barn roof.

A table of roof material weights including sheathing insulation and other decking materials. Clay tiles interlocking 0 45 kn m. The following table provides typical weights dead load self weight for various roofing materials where possible the values were taken directly from manufacturer technical data sheets and are the actual weights of specific representative products. When used for storage only dead load of attic floor not floored 10 lbs.

Live load on attic floor local requirements. Pitched roof measured on plan timber trussed rafters. 1 lb m ft 2 4 88 kg m 2. 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.

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. The weight of truss rafter must be added to calculate the dead load of the roof. For roofs that are flat and with ground snow loads lower than 20 pounds per square foot the roof snow load is equal to 70 of the product of the exposure thermal and importance factors and the ground snow load. Concrete tiles plain 0 75 kn m.

Dead load of roof of wood shingle construction 10 lbs. Pitched roof measured on slope clay tiles plain 0 65 kn m. Instruct applicants to account for the potential weight of reroofing materials in their calculations as part of the original design. For ground snow loads greater than 20 pounds per square foot the roof load is equal to.

For example the dead load of the roof might include the weight of the rafters sheathing roof covering and anything else that is permanently attached to the roof structure such as drywall on a cathedral. Step 4 determine the flat roof snow load.