The snow load that is applied to our structure is not the ground snow load but in most cases the flat roof snow load.
Griund versus roof load.
Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10.
In our case let s assume that our structure has a flat roof roof slope 5.
Length of roof upwind of the snow drift.
Ground snow load pg.
The determination of the drift load that is.
After that you ll need to use a snow load calculator.
Victor staley a building official in the town of brewster mass responds.
Enter the information requested like the rise and the roof ground snow load for your city exposure roof type etc.
1 0 importance factor i.
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.
Ground and roof snow loads for idaho by r.
Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched.
This downward imposed load on the home is also known as the snow load.
70 60 50 40 35 30 25 x0 7 x0 7 x0 7 x0 7 x0 7 x0 7 x0 7 roof snow load.
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.
The roof shall be designed for the live load indicated in table r301 6 or the snow load indicated.
Figure 7 1 pages 84 85 and table 7 1 page 92.
The calculator will tell you the pounds per square foot of snow.
The flat roof snow load is calculated using formula 7 3 1.
Length of high roof lu.
Table 1 1 page 3.
1 0 exposure factor ce.
Economical structural design in these areas requires an accurate prediction of the ground snow plus an understanding of how the snow is distributed on the roofs.
It s quite easy to find one online.
This issue of live load vs.
49 42 35 28 24 5 21 17 5 assumed value thermal factor ct.
Ground snow load or roof snow load snow load.
Sheikh taheri snow loading is the most severe test of roof structures in many parts of the state of idaho.
Roof loads are a downward vertical force on the home.
Ground snow load might seem somewhat confusing until you read the basic premise that is identified in irc section r301 6 which states.
Then follow the instructions.
The north zone middle zone and the south zone are identified on the roof load zone map above.
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.
