Montana Roof Snow Loads

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.

Montana roof snow loads.

40 psf roof design. Right off the top count on a minimum of 30 psf that is state code. If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow. Schilke civil agricultural engineering montana state university august 1989.

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. Basic ground snow load. Use our montana ground snow loads map to easily determine the ground snow load administrative rules of montana. 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. Local and or state requirements on the ground snow loads or roof loads supercede the values provided by this tool. Roof snow load. 46 psf per snow loads for design in montana f f.

Montana ground snow load finder. You can go to the montana ground snow load finder. 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. 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.

Based on 100 year 1 hour rainfall of 1 22 inches frost depth 3 ft 1 story building 4 ft 2 story building. 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 minimum design roof snow load. To find your precise required snow load you.

In general roof loads are predictable and can be incorporated into the dead load of a house. Why snow load information. Note that the state of montana requires a minimum roof snow load of 30 psf be used for design. You can click on the map below to find the design ground snow load for that location.

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.