Ground Snow Load To Roof Load

The flat roof snow load is calculated using formula 7 3 1.

Ground snow load to roof load.

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. If the ground snow load isn t specified then a ground snow load needs to be assumed and the truss designer and the building designer may not be on the same page as it relates to this design assumption. Asce 7 drift height calculation. Ground snow load refers to the weight of water per square foot that is exerted on the ground by the snow pack.

Roof snow load and the applicable snow. Even when the specification is clear regarding ground snow vs. The ground snow load is pretty much what it sounds like. If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow.

0 7 x pg ground snow load pf roof snow load roof snow load examples. Roof snow load is a much more important statistic and is computed from the ground load in a region. A predictable load situation that is derived from snowfall records over the years in a particular region photo 2. 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.

These figures are established by the local jurisdiction in my case the state of massachusetts which lists ground snow loads for each town in the state. For additional questions or concerns about specific ground snow loads please call us at 1 425 741 5555. 0 7 x 50 psf 35 psf. Psf pounds per square foot above line 60 psf.

The purpose of this web site is to provide ground snow load analysis information and data gathered from all 50 states. When discussing snow load with anyone it is crucial to have a clear understanding as to if the load is a ground or flat roof snow load. Pf is flat roof snow load if as a consumer your concern is snowfall and you want to upgrade the ability of your building to carry it this is the value to increase. This statistic is not often directly relevant although heavy snow can damage some landscaping features.

If you need to gather ground snow load data programmatically please consider our api service. Each state has a listing of building code and applicable guidelines for snow loads as well as details about where the snow load information may be found or purchased. 0 7 x 60 psf 42 psf below line. The snow load that is applied to our structure is not the ground snow load but in most cases the flat roof snow load.

60 ground snow psf below line 50 psf 50 ground snow psf. Purpose of this web site. Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10. Please review our state snow loads page to investigate state specific snow load requirements.

Use our roof snow load calculator to determine your design roof snow loads.