Fillmore County, MN Roof Snow Load - 28 psf
Fillmore County, MN roof snow load, translated
A typical heated home in Fillmore County is designed to carry 28 pounds per square foot of snow on its roof, per ASCE 7-22.
On a roof that means 61.6 in. of fresh snow, 22.4 in. once it packs down, or 5.6 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.
Fillmore County, MN: quick facts
- Design roof snow load28 psf
- Ground snow load, ASCE 7 map40 psf
- National rank#250 of 2,758
- Minnesota rank#84 of 87
- Population21,502
- Annual snowfall, NOAA normal42.2 in.
- FIPS27045
Where Fillmore County ranks
#84 of 87 Minnesota counties by design load, top 9% of 2,758 nationally - that's Fillmore County's spot. Minnesota counties average 37.4 psf; Fillmore County runs 9.4 psf lower than that.
FIPS 27045, population 21,502, centered near 43.6792°N 92.0939°W. ASCE 7's underlying ground snow load here is 40 psf before the code's exposure and importance factors bring it to the 28 psf design figure above.
Fillmore County: average annual snowfall
Fillmore County sees about 42.2 in. of snow most winters, per the PRESTON, MN US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Fillmore 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. Details: the calculation guide.