The flat roof snow load is calculated using formula 7 3 1.
Ground snow load to roof load.
In our case let s assume that our structure has a flat roof roof slope 5.
0 7 x pg ground snow load pf roof snow load roof snow load examples.
The purpose of this web site is to provide ground snow load analysis information and data gathered from all 50 states.
A predictable load situation that is derived from snowfall records over the years in a particular region photo 2.
Please review our state snow loads page to investigate state specific snow load requirements.
Asce 7 drift height calculation.
Purpose of this web site.
For additional questions or concerns about specific ground snow loads please call us at 1 425 741 5555.
Ground snow load refers to the weight of water per square foot that is exerted on the ground by the snow pack.
Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10.
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.
Roof snow load is a much more important statistic and is computed from the ground load in a region.
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.
The snow load that is applied to our structure is not the ground snow load but in most cases the flat roof snow 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.
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.
Roof snow load and the applicable 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.
If you live in the us our snow load calculator compares the total weight on your roof with the permissible load calculated according to the standards issued by the american society of civil engineers regarding the minimum design loads for buildings and other structures asce7 16.
60 ground snow psf below line 50 psf 50 ground snow psf.
0 7 x 50 psf 35 psf.
Even when the specification is clear regarding ground snow vs.
To calculate roof snow load per residential building code.
Psf pounds per square foot above line 60 psf.
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.
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.
If you need to gather ground snow load data programmatically please consider our api service.
