Michigan Roof Snow Load

Roof covering section maximum ultimate design wind speed v ult 140 mph maximum ultimate design wind speed v ult 140 mph.

Michigan roof snow load.

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. The state has amended the snow load requirements from the ibc and a snow load map may be found at. Figure 1608 2 for any location in the state of michigan. 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. Arnett predicts this area. Snow load wind speedd mph seismic design categoryf weatheringa frostline depthb termite c table r301 2 5 90 see sec r301 2 2 1 figure r301 2 2 severe 42 see note b figure r301 2 6 see note e yes see note g figure r403 3 2 see footnote j for si. 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. Table r905 1 1 2 underlayment application. 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.

Flat roof snow load pf. Established in 1989 our company is family owned and operated. The minimum design roof snow load after allowed reductions shall be 30 psf. Two feet of old snow and 2 feet of new snow could weigh as much as 60 pounds per square foot of roof space which is beyond the typical snow load capacity of most roofs.

The publication is 20 and may be purchased from msu civil engineering at 406 994 2111. Use our michigan ground snow loads map to easily determine the ground snow load 2009 michigan building code. Snow exposure factor ce. Together owners steven letherer and bernie letherer have over half a century of experience in the truss industry.