Martin County, MN Roof Snow Load - 35 psf
What ASCE 7 says about snow load in Martin County
That's Martin County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from.
Converted to something you can actually eyeball on a roof: about 77 in. of fresh powder, 28 in. once it settles and packs down, or just 7 in. if it's turned to 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.
Martin County, MN: quick facts
- Design roof snow load35 psf
- Ground snow load, ASCE 7 map50 psf
- National rank#160 of 2,758
- Minnesota rank#62 of 87
- Population19,561
- Annual snowfall, NOAA normal39.7 in.
- FIPS27091
Where Martin County's figure sits nationally
Out of 2,758 rated US counties, Martin County sits at #160, the top 6% nationally - #62 of 87 within Minnesota. Minnesota counties average 37.4 psf; Martin County runs 2.4 psf lower than that.
Near 43.6772°N 94.5471°W, FIPS 27091: Martin County counts 19,561 residents and a 50 psf map value, which the code's own factors turn into 35 psf.
How much it actually snows in Martin County
Most winters bring Martin County roughly 39.7 in. of snow - NOAA's normal at SWEA CITY 5N, IA US, 19.5 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Martin County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.
Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Martin County's county-wide figure. (How this figure is calculated.)