Montana Roof Snow Load

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.

Montana roof snow load. 46 psf per snow loads for design in montana f f. 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. Roof snow load. 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. Local and or state requirements on the ground snow loads or roof loads supercede the values provided by this tool. Montana ground snow load finder.

Use our montana ground snow loads map to easily determine the ground snow load administrative rules of montana. Why snow load information. Snow loads for structural design in montana revised 2004 gregory p. You can click on the map below to find the design ground snow load for that location.

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

The minimum design roof snow 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 shall be determined by the building official. Schilke civil agricultural engineering montana state university august 1989.