Roof Slope Factor Snow Load

Overestimation of snow loads can unnecessarily increase the cost of construction.

Roof slope factor snow load.

All of the load cases required to fully design an actual structure are not provided by this. P s c s p f the thermal factor c t from table e 3 determines if a roof is cold or warm slippery surface values shall be used only where the roof s surface is unobstructed and sufficient space is available below the eaves to accept all the sliding snow. Boca also allows you to reduce the snow load for roofs with slopes greater than 30 degrees presumably because snow will slide or blow off steeply pitched roofs. For dead loads you are correct.

Slope 30 degrees. If the snow weighs 10 pounds per cubic foot and there are 1 5 feet on the roof each square foot of the roof is getting 15 pounds of pressure. You can also find the load per square meter or square foot of roofing by opening the advanced mode. Online snow load calculator for buildings with flat or low slope roofs for balanced.

The balanced snow load is applied everywhere where the roof structure is located. S 1 0 1 0 8 1 0 1 1 0 1 1 8kpa s 1 8 kpa s 37 6 psf. Roof slope 0 degrees slope factor. If your structure has a sloped or flat roof you still need to calculate the flat roof snow load.

C s 1 uls. Roof snow load nbc 2010 version 0 1 0 september 13 2020. The sloped roof snow load p s shall be obtained by multiplying the flat roof snow load p f by the roof slope factor c s. If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow.

To figure out the load on your roof take the depth of snow in feet and multiply it by the weight of a cubic foot of snow. After you obtain the roof slope factor from those sections in asce 7 10 the balanced design snow load for the sloped roof can easily be calculated using equation 7 4 1. If you want to calculate these values by hand use the following formulas. Snow load thickness density.

This is the snow load calculated in the previous section.