Grant County, KY Roof Snow Load - 20 psf
What ASCE 7 says about snow load in Grant County
That's Grant County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. ASCE 7's low-slope-roof minimum (§7.3.4) raises the governing figure to 20 psf - higher than the 14 psf the ground-load formula alone would give, and the code says use the larger one.
Converted to something you can actually eyeball on a roof: about 44 in. of fresh powder, 16 in. once it settles and packs down, or just 4 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.
Grant County at a glance
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#904 of 2,758
- Kentucky rank#9 of 120
- Population25,722
- Annual snowfall, NOAA normal16 in.
- FIPS21081
Where Grant County's figure sits nationally
Out of 2,758 rated US counties, Grant County sits at #904, the top 33% nationally - #9 of 120 within Kentucky. Kentucky counties average 15.7 psf; Grant County runs 4.3 psf higher than that.
Near 38.6492°N 84.6259°W, FIPS 21081: Grant County counts 25,722 residents and a 20 psf map value, which the code's own factors turn into 20 psf.
How much it actually snows in Grant County
Most winters bring Grant County roughly 16 in. of snow - NOAA's normal at WILLIAMSTOWN, KY US, 3.6 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Grant 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 Grant County's county-wide figure. (How this figure is calculated.)