Jefferson County, OH Roof Snow Load - 20 psf
Jefferson County, OH roof snow load, translated
A typical heated home in Jefferson County is designed to carry 20 pounds per square foot of snow on its roof, per ASCE 7-22. §7.3.4's low-slope minimum of 20 psf is what actually governs on a flat or low-pitch roof here - higher than the 17.5 psf the base ground-load formula gives.
On a roof that means 44 in. of fresh snow, 16 in. once it packs down, or 4 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.
Jefferson County in numbers
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map25 psf
- National rank#701 of 2,758
- Ohio rank#37 of 86
- Population63,900
- Annual snowfall, NOAA normal25.8 in.
- FIPS39081
Where Jefferson County ranks
#37 of 86 Ohio counties by design load, top 25% of 2,758 nationally - that's Jefferson County's spot. Jefferson County's figure lands almost exactly on Ohio's own county-average of 20 psf.
FIPS 39081, population 63,900, centered near 40.3994°N 80.7635°W. ASCE 7's underlying ground snow load here is 25 psf before the code's exposure and importance factors bring it to the 20 psf design figure above.
Jefferson County: average annual snowfall
Jefferson County sees about 25.8 in. of snow most winters, per the CADIZ, OH US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Jefferson 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. Details: the calculation guide.