Carlton County, MN Roof Snow Load - 42 psf
How much snow is too much for a roof in Carlton County, MN?
42 psf: that's what ASCE 7-22 requires a typical heated home's roof in Carlton County to carry.
Picture it, not just weigh it: 92.4 in. if it's fresh powder, 33.6 in. once it settles, or a mere 8.4 in. if it's ice. A load this size is a serious structural matter; pre-modern-code homes and low-slope or flat-roofed sections are the ones most worth an inspection.
Got real snow on a Carlton County roof right now?
Carlton County at a glance
- Design roof snow load42 psf
- Ground snow load, ASCE 7 map60 psf
- National rank#37 of 2,758
- Minnesota rank#9 of 87
- Population36,745
- Annual snowfall, NOAA normal71.3 in.
- FIPS27017
How Carlton County compares
42 psf ranks #37 of 2,758 US counties with a mapped snow load (top 1%) - and #9 of 87 in Minnesota. 37.4 psf is Minnesota's typical county figure - Carlton County beats it by 4.6 psf.
Population 36,745 (FIPS 27017), roughly 46.6038°N 92.671°W. The 60 psf ground snow load ASCE 7-22 maps here becomes 42 psf once the code's own design factors are applied.
Typical snowfall in Carlton County, MN
NOAA's 30-year normal for Carlton County: 71.3 in. of snow a year, from the CLOQUET, MN US station. (fresh vs. packed vs. ice explains why.)
What this Carlton County figure assumes
This is a county-level reference figure for a typical heated home built to Risk Category II (ordinary residential), on a partially exposed lot - the assumptions ASCE 7-22 itself treats as the default case. A steeper roof, a fully exposed hilltop lot, an unheated structure, or a higher risk category all change the actual number.
Carlton County's permit office wants an address-specific figure, not this county average - the ASCE 7 Hazard Tool is free, takes under a minute, and outputs a PDF most reviewers accept. Details: the calculation guide.