Montmorency County, MI Roof Snow Load - 35 psf
Montmorency County, MI roof snow load, translated
A typical heated home in Montmorency County is designed to carry 35 pounds per square foot of snow on its roof, per ASCE 7-22.
On a roof that means 77 in. of fresh snow, 28 in. once it packs down, or 7 in. of solid ice - three very different piles for the same load. A serious structural load. Homes built before modern snow-load provisions, or with low-slope/flat roof sections, are the ones most worth having checked.
Montmorency County, MI: quick facts
- Design roof snow load35 psf
- Ground snow load, ASCE 7 map50 psf
- National rank#179 of 2,758
- Michigan rank#31 of 70
- Population9,828
- Annual snowfall, NOAA normal83.9 in.
- FIPS26119
Where Montmorency County ranks
#31 of 70 Michigan counties by design load, top 6% of 2,758 nationally - that's Montmorency County's spot. 31.7 psf is Michigan's typical county figure - Montmorency County beats it by 3.3 psf.
FIPS 26119, population 9,828, centered near 45.0241°N 84.1301°W. ASCE 7's underlying ground snow load here is 50 psf before the code's exposure and importance factors bring it to the 35 psf design figure above.
Montmorency County: average annual snowfall
Montmorency County sees about 83.9 in. of snow most winters, per the VANDERBILT 11ENE, MI US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Montmorency County's figure
The figure above assumes the case ASCE 7-22 treats as typical: a heated, ordinary-occupancy home on a partially exposed site. Change any of those - exposure, heating, roof pitch, occupancy category - and the real design number moves.
A building permit needs the number at your exact address, not the county average - the free ASCE 7 Hazard Tool returns that from your coordinates in about a minute and produces a PDF a plan reviewer will accept. (How this figure is calculated.)