Marinette County, WI Roof Snow Load - 42 psf
Marinette County, WI roof snow load, translated
A typical heated home in Marinette County is designed to carry 42 pounds per square foot of snow on its roof, per ASCE 7-22.
On a roof that means 92.4 in. of fresh snow, 33.6 in. once it packs down, or 8.4 in. of solid ice - three very different piles for the same load. This is a serious structural load - older homes built before modern snow-load provisions, or ones with low-slope or flat roof sections, are worth having checked.
Marinette County in numbers
- Design roof snow load42 psf
- Ground snow load, ASCE 7 map60 psf
- National rank#34 of 2,758
- Wisconsin rank#3 of 72
- Population42,343
- Annual snowfall, NOAA normal58.3 in.
- FIPS55075
Where Marinette County ranks
#3 of 72 Wisconsin counties by design load, top 1% of 2,758 nationally - that's Marinette County's spot. That's 11.1 psf above Wisconsin's own county-average design load of 30.9 psf.
FIPS 55075, population 42,343, centered near 45.3469°N 87.9912°W. ASCE 7's underlying ground snow load here is 60 psf before the code's exposure and importance factors bring it to the 42 psf design figure above.
Marinette County: average annual snowfall
Marinette County sees about 58.3 in. of snow most winters, per the CRIVITZ HIGH FALLS, WI US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Marinette 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. See the methodology guide.