Montana Roof Snow Loads

Snow loads shall be determined by the building official.

Montana roof snow loads.

Basic ground snow load. If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow. 46 psf per snow loads for design in montana f f. 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.

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 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. Use our montana ground snow loads map to easily determine the ground snow load administrative rules of montana.

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 find your precise required snow load you. 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. Snow loads for structural design in montana revised 2004 gregory p.

Why snow load information. The minimum design roof snow load. 24 301 146 for any location in the state of montana. 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. Based on 100 year 1 hour rainfall of 1 22 inches frost depth 3 ft 1 story building 4 ft 2 story building. Schilke civil agricultural engineering montana state university august 1989. Montana ground snow load finder.

Roof snow load. You can go to the montana ground snow load finder. 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. 40 psf roof design.

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.