Manitowoc County, WI Roof Snow Load - 24.5 psf
Manitowoc County, WI roof snow load, translated
A typical heated home in Manitowoc County is designed to carry 24.5 pounds per square foot of snow on its roof, per ASCE 7-22.
On a roof that means 53.9 in. of fresh snow, 19.6 in. once it packs down, or 4.9 in. of solid ice - three very different piles for the same load. 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.
Manitowoc County at a glance
- Design roof snow load24.5 psf
- Ground snow load, ASCE 7 map35 psf
- National rank#318 of 2,758
- Wisconsin rank#48 of 72
- Population81,513
- Annual snowfall, NOAA normal34.6 in.
- FIPS55071
Where Manitowoc County ranks
#48 of 72 Wisconsin counties by design load, top 12% of 2,758 nationally - that's Manitowoc County's spot. Wisconsin counties average 30.9 psf; Manitowoc County runs 6.4 psf lower than that.
FIPS 55071, population 81,513, centered near 44.1561°N 87.5774°W. ASCE 7's underlying ground snow load here is 35 psf before the code's exposure and importance factors bring it to the 24.5 psf design figure above.
Manitowoc County: average annual snowfall
Manitowoc County sees about 34.6 in. of snow most winters, per the MANITOWOC, WI US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Manitowoc 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. (How this figure is calculated.)