Roof Load Width Flat 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.

Roof load width flat roof.

You can enter this value either as a ratio x 12 or as an angle whichever suits you better. Lr reduced roof live load per square foot m 2 of horizontal projection supported by the member. This sizing guide for roof rafters will help determine what you need for your small project. You can enter these values in any units you d like including meters and feet.

There are several variables to consider when determining the proper rafter size. Intuitively this is the number of inches of snow on your roof in the place where the cover is the thickest. If your roof is pitched enter the length and width of the flat area covered by the roof. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter.

The dead load consists of the actual weight of materials that comprise the roof plus any fixed equipment that the roof supports. For ground snow loads greater than 20 pounds per square foot the roof load is equal to. Length and width of your roof. Calculate the carport roof load using a combination of the dead load and live load measurements.

Step 4 determine the flat roof snow load. Roof loads are used to determine the size of beams joists and columns that support a roof.