RE: Metal roofing, low slope and snow
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see most clipped and recent clippingsIn Maine, the state building code requires a roof to be designed to resist a snow load of between 60 psf (on the coast) and 100 psf (in the northwest). These loads can be reduced as the slope of a roof increases above 6 in 12 and should be increased where drifting is likely. On a 3 in 12 slope roof these loads would translate to fresh wet snow depths of between 5 and 9 feet. You must design the roof for the expected load or buy a snow rake and use it as needed. These loading requirements have a lot of safety factors built in which explains why more roofs don't collapse every winter.
- Posted by mightyanvil (My Page) on Fri, Sep 26, 08 at 17:53