Sheridan County, MT Roof Snow Load - 21 psf
Sheridan County, MT roof snow load, translated
A typical heated home in Sheridan County is designed to carry 21 pounds per square foot of snow on its roof, per ASCE 7-22.
On a roof that means 46.2 in. of fresh snow, 16.8 in. once it packs down, or 4.2 in. of solid ice - three very different piles for the same load. This is a meaningful design load - most modern-code homes handle it fine, though an addition, a carport or a flat-roofed section can be a weak spot.
Sheridan County at a glance
- Design roof snow load21 psf
- Ground snow load, ASCE 7 map30 psf
- National rank#482 of 2,758
- Montana rank#2 of 29
- Population3,448
- Annual snowfall, NOAA normal31.3 in.
- FIPS30091
Where Sheridan County ranks
#2 of 29 Montana counties by design load, top 17% of 2,758 nationally - that's Sheridan County's spot. That's 2 psf above Montana's own county-average design load of 19 psf.
FIPS 30091, population 3,448, centered near 48.7056°N 104.5339°W. ASCE 7's underlying ground snow load here is 30 psf before the code's exposure and importance factors bring it to the 21 psf design figure above.
Sheridan County: average annual snowfall
Sheridan County sees about 31.3 in. of snow most winters, per the RAYMOND BORDER STN, MT US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Sheridan 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. See the methodology guide.