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.
Montana roof snow loads.
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.
In general roof loads are predictable and can be incorporated into the dead load of a house.
Snow loads shall be determined by the building official.
You can click on the map below to find the design ground snow load for that location.
You can go to the montana ground snow load finder.
Right off the top count on a minimum of 30 psf that is state code.
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.
Use our montana ground snow loads map to easily determine the ground snow load administrative rules of montana.
In areas of the state outside of certified local government jurisdictions the design snow load shall be based on the ground snow loads developed in snow loads for structural design in montana authored by f f.
In areas of the state outside of certified city county and town jurisdictions the design snow load shall be based on the ground snow loads developed in snow loads for structural design in montana civil engineering department montana state university 2004 revised edition.
The minimum design roof snow load.
A great deal of confusion currently exists among engineers architects recreation specialists and maintenance personnel concerning the proper snow loading to use for the design and maintenance of trail bridges building roofs and other structures in mountainous high snow load areas.
But there are loads of short duration that qualify as a live load roof live load.
Based on 100 year 1 hour rainfall of 1 22 inches frost depth 3 ft 1 story building 4 ft 2 story building.
Snow loads for structural design in montana revised 2004 gregory p.
Roof snow load.
To find your precise required snow load you.
Note that the state of montana requires a minimum roof snow load of 30 psf be used for design.
If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow.
24 301 146 for any location in the state of montana.
40 psf roof design.
Basic ground snow load.
Montana ground snow load finder.
Local and or state requirements on the ground snow loads or the roof loads subsequently calculated from these values supercede the values provided by this snow load finder tool.
Local and or state requirements on the ground snow loads or roof loads supercede the values provided by this tool.
