SnowLoadCheck

Grant County, OR Roof Snow Load - 10 psf

Grant County, OR: your roof's ASCE 7 snow number, in plain English

Light
10 psf

Grant County's roofs are built to hold 10 psf of snow, the ASCE 7-22 figure a permit reviewer checks first. Flat and low-pitch roofs in Grant County are actually governed by ASCE 7's §7.3.4 minimum of 10 psf, not the 7 psf the ground-load formula alone would produce.

In depth, not weight: that's roughly 22 inches of fresh, light snow, 8 inches of old, settled snow, or as little as 2 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. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.

Grant County, OR: quick facts

Grant County by the numbers

Nationally that's #2,028 out of 2,758 rated counties, the top 74%; within Oregon alone, Grant County ranks #14 of 15. That's 2 psf below Oregon's own county-average design load of 12 psf.

Grant County, FIPS 41023, is home to 7,093 people near 44.4963°N 119.0141°W. Its 10 psf ground snow load figure is the map value; 10 psf is what a roof is actually designed for.

Grant County's snowfall, most winters

9.6 in. a year: that's Grant County's NOAA 1991-2020 snowfall normal, measured at JOHN DAY, OR US (5.7 mi away). See the density guide.

Before you rely on Grant County's number

Treat the Grant 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. Details: the calculation guide.