Roof Snow Load Michigan

The ground snow load pg shall be indicated.

Roof snow load michigan.

Snow exposure factor ce. Figure 1608 2 for any location in the state of michigan. The sloped roof snow load is calculated using equation 7 4 1. The publication is 20 and may be purchased from msu civil engineering at 406 994 2111.

P s c s p f where. You can click on the map below to find the design ground snow load for that location. In areas where the ground snow load pg exceeds 10 pounds per square foot psf 0 479 kn m 2 the following additional information shall also be provided regardless of whether snow loads govern the design of the roof. C s roof slope factor p f flat roof snow load.

This downward imposed load on the home is also known as the snow load. Flat roof snow load pf. For roof slopes from two units vertical in 12 units horizontal 2 12 up to four units vertical in 12 units horizontal 4 12 underlayment shall be two layers applied in the following manner. Table r905 1 1 2 underlayment application.

Together owners steven letherer and bernie letherer have over half a century of experience in the truss industry. 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 c s times 40 psf for roofs with a slope greater than 5 degrees. 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 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. Roof covering section maximum ultimate design wind speed v ult 140 mph maximum ultimate design wind speed v ult 140 mph. Established in 1989 our company is family owned and operated. 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.

The minimum design roof snow load after allowed reductions shall be 30 psf.