Roof Slope And Snow Load

Is the roof warm or cold.

Roof slope and snow load.

The sloped roof snow load is calculated using equation 7 4 1. 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. Fresh powder weighs much less than wind packed drifts. 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.

Snow varies in weight depending on the density. 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 where. The sloped roof snow load ps is found by multiplying the the value of csdepends on such factors as the slope of the roof.

Snow loads acting on a sloping surface shall be assumed to act on the horizontal projection of that surface. Find the snow density. 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. 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 load thickness density. C s roof slope factor. Sloped roof snow loads are assumed to be acting on the horizontal projection of the surface.

If you want to calculate these values by hand use the following formulas. Check out our snow weight calculator to find the density of various types of snow. The final step in calculating the snow load is to multiply the volume of snow on the roof by its density. P s c s p f.