Greenbrier County, WV Roof Snow Load - 20 psf
What ASCE 7 says about snow load in Greenbrier County
That's Greenbrier 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 17.5 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. This is a meaningful design load - most modern-code homes handle it fine, though an addition, a carport or a flat-roofed section can be a weak spot.
Got real snow on a Greenbrier County roof right now?
Greenbrier County, WV: quick facts
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map25 psf
- National rank#852 of 2,758
- West Virginia rank#10 of 34
- Population31,851
- Annual snowfall, NOAA normal29.5 in.
- FIPS54025
Where Greenbrier County's figure sits nationally
Out of 2,758 rated US counties, Greenbrier County sits at #852, the top 31% nationally - #10 of 34 within West Virginia. Greenbrier County's figure lands almost exactly on West Virginia's own county-average of 20 psf.
Near 37.9244°N 80.4506°W, FIPS 54025: Greenbrier County counts 31,851 residents and a 25 psf map value, which the code's own factors turn into 20 psf.
How much it actually snows in Greenbrier County
Most winters bring Greenbrier County roughly 29.5 in. of snow - NOAA's normal at LEWISBURG 3 N, WV US, 5.3 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Greenbrier 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 Greenbrier County's county-wide figure. Details: the calculation guide.