Roof Slope And Snow Load

P s c s p f where.

Roof slope and snow load.

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. Snow varies in weight depending on the density. Sloped roof snow loads i s when the roof slope is greater than 5 the roof is considered sloped. If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow.

Snow loads acting on a sloping surface shall be assumed to act on the horizontal projection of that surface. P s c s p f. The sloped roof snow load ps is found by multiplying the the value of csdepends on such factors as the slope of the roof. The sloped roof snow load is calculated using equation 7 4 1.

C s roof slope factor. If you want to calculate these values by hand use the following formulas. The final step in calculating the snow load is to multiply the volume of snow on the roof by its density. You can also find the load per square meter or square foot of roofing by opening the advanced mode.

Before moving on multiply the area by the snow depth in feet to find the volume of snow on the roof. 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. Fresh powder weighs much less than wind packed drifts. Once you know these values our snow load calculator automatically finds the total weight of snow on your roof.

Find the snow density. Check out our snow weight calculator to find the density of various types of snow. 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. Snow load thickness density.