Michigan Roof Snow Load

Together owners steven letherer and bernie letherer have over half a century of experience in the truss industry.

Michigan roof snow load.

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. You can click on the map below to find the design ground snow load for that location. The publication is 20 and may be purchased from msu civil engineering at 406 994 2111. Michigan technological pro rankings and.

Established in 1989 our company is family owned and operated. The lesser known hud zones thermal and roof load. Where flat roof snow loads exceed 30 psf 1 44 kn m 2 20 percent shall be combined with seismic loads. The north zone design live load equates to 40 pounds per square foot the middle zone equates to 30 pounds per square foot and the south zone equates to 20 pounds per square foot.

The north zone middle zone and the south zone are identified on the roof load zone map above. The state has amended the snow load requirements of the 2009 ibc figure 1608 2 and the 2009 irc figure r301 2 5 table r301 2 1 and table. Why snow load information. The minimum design roof snow load after allowed reductions shall be 30 psf.

This downward imposed load on the home is also known as the snow load. 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. Figure 1608 2 for any location in the state of michigan. The total roof snow load including additional loading effects due to drifting snow sliding snow unbalanced loading conditions and partial loading conditions shall not be less than 40 psf for roofs with a slope less than or equal to 5 degrees and shall not be less than the slope factor cs times 40 psf for roofs with a slope greater than 5 degrees.

Flat roof snow loads of 30 psf 1 44 kn m 2 or less and roof live loads of 30 psf 1 44 kn m 2 or less need not be combined with seismic loads.