Flat Roof Snow Load Calculator

A completely flat roof is a poor design as water and snow will collect on it eventually leading to your roof collapsing in from the weight of it all.

Flat roof snow load calculator. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. The smallest pitch of a roof is 0 5 12. You might also be interested in our snow to water volume calculator. For ground snow loads greater than 20 pounds per square foot the roof load is equal to 70 of the product of the exposure thermal and importance factors the ground snow load and 20 pounds.

Use this same calculation to find the total weight of snow on a flat 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. Basing on the roof parameters you specified in the first section our snow load calculator displays the maximum allowable snow cover thickness and snow weight. Estimate the total weight of snow in your garden by multiplying the size of the area in square metres by the snow load.

If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow. 500 times 1 25 yields 625 kg 1 378 lb of snow. Make sure to not wait for too long though. Online snow load calculator for buildings with flat or low slope roofs for balanced snow drift and rain on snow surcharge loadings calculator asce 7 05 for structural engineers construction professionals and building planners.

It also informs you whether you should immediately remove some of the snow or you can wait a little bit longer. Span calculator for wood joists and rafters also available for the android os. If you have any concerns as you are determining your flat roof snow load consult with a structural engineer or roofing specialist. This is highly regional as weights of snow for example range from 10 to 300 pounds per square foot based on moisture and volume of the 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. For example using a 25 by 20 metre garden. The final step in calculating the snow load is to multiply the volume of snow on the roof by its density. If your structure has a sloped or flat roof you still need to calculate the flat roof snow load.

This is all of the natural stresses imposed upon a roof such as snow loads rain loads and wind loads. Determine the transient load of the roof. A common choice for flat roofing material is epdm rubber as it is highly durable waterproof and can be made from recycled materials. Roof snow load calculation.