Campbell County, VA Roof Snow Load - 20 psf
Campbell County, VA: your roof's ASCE 7 snow number, in plain English
Campbell County's roofs are built to hold 20 psf of snow, the ASCE 7-22 figure a permit reviewer checks first. 17.5 psf is what the ground-load formula alone gives; Campbell County's 20 psf low-slope minimum (§7.3.4) beats it, so that figure is the one that governs on flat and low-pitch roofs.
In depth, not weight: that's roughly 44 inches of fresh, light snow, 16 inches of old, settled snow, or as little as 4 inches of solid ice - snow that heavy is rare here but ice from a freeze-thaw cycle adds up far faster than the depth suggests. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.
Campbell County in numbers
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map25 psf
- National rank#719 of 2,758
- Virginia rank#28 of 110
- Population55,342
- Annual snowfall, NOAA normal10.9 in.
- FIPS51031
Campbell County by the numbers
Nationally that's #719 out of 2,758 rated counties, the top 26%; within Virginia alone, Campbell County ranks #28 of 110. 18.3 psf is Virginia's typical county figure - Campbell County beats it by 1.7 psf.
Campbell County, FIPS 51031, is home to 55,342 people near 37.2102°N 79.0954°W. Its 25 psf ground snow load figure is the map value; 20 psf is what a roof is actually designed for.
Campbell County's snowfall, most winters
10.9 in. a year: that's Campbell County's NOAA 1991-2020 snowfall normal, measured at CONCORD 4 SSW, VA US (9 mi away). See the density guide.
Before you rely on Campbell County's number
Treat the Campbell County figure as a starting point, not a final answer: it assumes standard occupancy, a heated structure and a moderately sheltered site, per ASCE 7-22's own defaults. Exposed terrain, an unheated building or a steeper roof all shift the real number.
For a real application, skip the county number and go straight to the ASCE 7 Hazard Tool - enter your coordinates and it returns a site-specific figure a plan reviewer will recognize. See the methodology guide.