Flat Roof Snow Load Calculator

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.

Flat roof snow load calculator.

Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. It also informs you whether you should immediately remove some of the snow or you can wait a little bit longer. If you have any concerns as you are determining your flat roof snow load consult with a structural engineer or roofing specialist. This is all of the natural stresses imposed upon a roof such as snow loads rain loads and wind loads.

If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow. A common choice for flat roofing material is epdm rubber as it is highly durable waterproof and can be made from recycled materials. Determine the transient load of the roof. 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. 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. 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.

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. The smallest pitch of a roof is 0 5 12. Span calculator for wood joists and rafters also available for the android os. Flat roof with no permanent access and altitude not exceeding 100m 0 75 kn m udl 0 9 kn point load most areas exceeding 100m but not exceeding 200m excluding parts of scotland pennines north east england refer to bs 6399 3 1 kn m udl 0 9 kn point load.

The final step in calculating the snow load is to multiply the volume of snow on the roof by its density. 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. If you have a density range then multiply the volume by each part of the range separately to find the minimum and maximum snow load. 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.