Montana Ground Snow Load To Roof Converter

24 301 146 for any location in the state of montana.

Montana ground snow load to roof converter.

You can click on the map below to find the design ground snow load for that location. All idaho snow courses included in the study had a minimum of 10 years of. For the design of an actual structure a registered and licensed professional should be consulted as per irc 2012 sec. 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 our case let s assume that our structure has a flat roof roof slope 5. Snow loads shall be determined by the building official. While the ground snow loads pro vided in this document may be used with confi dence climatic conditions can vary dramatically across short distances in montana. Montana ground snow load finder.

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 flat roof snow load is calculated using formula 7 3 1. Note that the state of montana requires a minimum roof snow load of 30 psf be used for design. 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 truss could be designed based on the assumption that the 25 psf roof snow load is a factored ground snow load in which case a ground snow load is back calculated using asce 7 based on the specified roof snow load pg 25 psf therein lies the problem with specifying only a roof snow load. The designer is encouraged to carefully evaluate the appropri ateness of the ground snow loads reported herein for his her specific site. The use of ground snow loads in building de. Ground snow loads to roof loads is contained in section 3.

If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow. 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. 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. All of the load cases required to fully design an actual structure are not provided by this calculator.

The snow load that is applied to our structure is not the ground snow load but in most cases the flat roof snow load. Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10. Use our montana ground snow loads map to easily determine the ground snow load administrative rules of montana. The scs data and this was used to convert the nws depths to loads.