Roof Load Width Flat Roof

The dead load consists of the actual weight of materials that comprise the roof plus any fixed equipment that the roof supports.

Roof load width flat roof.

Step 4 determine the flat roof snow load. 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. This sizing guide for roof rafters will help determine what you need for your small project. If your roof is pitched enter the length and width of the flat area covered by the roof.

There are several variables to consider when determining the proper rafter size. Roof loads are used to determine the size of beams joists and columns that support a roof. Flat roofs should be constructed to provide protection from wind uplift this can be achieved by either being sufficient weight to prevent lifting or by fixing the joists to the wall plates and securing the wall plate with vertical holding down straps at least 1m long and 30mm x 2 5mm in cross section at 2 0m centres. You can enter these values in any units you d like including meters and feet.

Lr reduced roof live load per square foot m 2 of horizontal projection supported by the member. You can enter this value either as a ratio x 12 or as an angle whichever suits you better. Calculate the carport roof load using a combination of the dead load and live load measurements. For ground snow loads greater than 20 pounds per square foot the roof load is equal to.

Length and width of your roof. Lo unreduced roof live load per square foot m 2 of horizontal projection supported by the member see table 1607 1.