Snow Loads For Church Roofs

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.

Snow loads for church roofs.

Snow load thickness density. Live roof load w wind load s snow load e earthquake load r rainwater load or ice water load t effect of material temperature h hydraulic loads from soil f hydraulic loads from fluids. 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. Figure 7 1 pages 84 85 and table 7 1 page 92.

Length of roof upwind of the snow drift. In our case let s assume that our structure has a flat roof roof slope 5. Ground snow load pg. Horizontal distance from eave to ridge.

Arch 331 note set 13 1 s2014abn 2 determining dead load from material weights. Snow loads are influenced by elevation general weather and moisture patterns slope direction exposure roof or trail bridge configuration and wind direction and severity. Copper is very resistant to fire. If you want to calculate these values by hand use the following formulas.

Length of roof downwind of the snow drift. Once you know these values our snow load calculator automatically finds the total weight of snow on your 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. You can shovel out a cubic foot of snow from the roof place it in a container and quickly weight it on a scale.

Then measure the depth of snow on the roof and multiply it by the weight of a cubic foot of that snow. This prevents snow from endangering the roof structure. The flat roof snow load is calculated using formula 7 3 1. But even if it would happen the roof will resist any load.

This makes it perfect for low pitched roofs. Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10. The boca code recognizes this and allows you to use the horizontal projection of the roof when calculating snow loads. The snow load that is applied to our structure is not the ground snow load but in most cases the flat roof snow load.

Overestimation of snow loads can unnecessarily increase the cost of construction. Thus snow weighing 10 pounds per cubic foot and at a depth of 18 inches on a roof is exerting 15 pounds of pressure per square foot. From eave to ridge w. Length of low roof ll.

Snow loads will just slide off the roof. If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow. It actually extinguishes embers sparks or other burning materials.