Montana Roof Snow Loads

If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow.

Montana roof snow loads. Why snow load information. 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. But there are loads of short duration that qualify as a live load roof live load. 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.

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. You can click on the map below to find the design ground snow load for that location. Right off the top count on a minimum of 30 psf that is state code. Based on 100 year 1 hour rainfall of 1 22 inches frost depth 3 ft 1 story building 4 ft 2 story building.

In general roof loads are predictable and can be incorporated into the dead load of a house. Montana ground snow load finder. The minimum design roof snow load. Basic ground snow load.

Roof snow load. 46 psf per snow loads for design in montana f f. To find your precise required snow load you. Local and or state requirements on the ground snow loads or roof loads supercede the values provided by this tool.

Snow loads shall be determined by the building official. 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. 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. You can go to the montana ground snow load finder.

Snow loads for structural design in montana revised 2004 gregory p. 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. 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. 40 psf roof design.

Note that the state of montana requires a minimum roof snow load of 30 psf be used for design.