Ionia County, MI Roof Snow Load - 24.5 psf
What ASCE 7 says about snow load in Ionia County
That's Ionia 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 53.9 in. of fresh powder, 19.6 in. once it settles and packs down, or just 4.9 in. if it's turned to ice. Modern-code homes carry a load like this without issue; an older addition, a carport, or any flat-roofed section is where it is worth checking first.
Ionia County at a glance
- Design roof snow load24.5 psf
- Ground snow load, ASCE 7 map35 psf
- National rank#321 of 2,758
- Michigan rank#45 of 70
- Population66,250
- Annual snowfall, NOAA normal54.2 in.
- FIPS26067
Where Ionia County's figure sits nationally
Out of 2,758 rated US counties, Ionia County sits at #321, the top 12% nationally - #45 of 70 within Michigan. That's 7.2 psf below Michigan's own county-average design load of 31.7 psf.
Near 42.9447°N 85.0738°W, FIPS 26067: Ionia County counts 66,250 residents and a 35 psf map value, which the code's own factors turn into 24.5 psf.
How much it actually snows in Ionia County
Most winters bring Ionia County roughly 54.2 in. of snow - NOAA's normal at IONIA 2SSW, MI US, 0.6 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Ionia 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 Ionia County's county-wide figure. Details: the calculation guide.