Roof Slope Factor Snow Load

This is the snow load calculated in the previous section.

Roof slope factor snow load.

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. If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow. Once you know these values our snow load calculator automatically finds the total weight of snow on your roof. 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.

S 1 0 1 0 8 1 0 1 1 0 1 1 8kpa s 1 8 kpa s 37 6 psf. All of the load cases required to fully design an actual structure are not provided by this. 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. For dead loads you are correct.

Roof slope 0 degrees slope factor. You can also find the load per square meter or square foot of roofing by opening the advanced mode. 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. Snow loads roof snow loads are influenced by elevation general weather and moisture patterns slope direction exposure roof configuration and wind direction and severity.

Snow load thickness density. If you want to calculate these values by hand use the following formulas. Overestimation of snow loads can unnecessarily increase the cost of construction. If your structure has a sloped or flat roof you still need to calculate the flat roof snow load.

C s 1 uls. The balanced snow load is applied everywhere where the roof structure is located. 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. Online snow load calculator for buildings with flat or low slope roofs for balanced.

Technically you should use the actual rafter length when adding up the weight of roofing materials.