Griggs County, ND Roof Snow Load - 28 psf
Griggs County, ND: your roof's ASCE 7 snow number, in plain English
Griggs County's roofs are built to hold 28 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 61.6 inches of fresh, light snow, 22.4 inches of old, settled snow, or as little as 5.6 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.
Griggs County in numbers
- Design roof snow load28 psf
- Ground snow load, ASCE 7 map40 psf
- National rank#297 of 2,758
- North Dakota rank#30 of 49
- Population2,227
- Annual snowfall, NOAA normal42.2 in.
- FIPS38039
Griggs County by the numbers
Nationally that's #297 out of 2,758 rated counties, the top 11%; within North Dakota alone, Griggs County ranks #30 of 49. 29.4 psf is North Dakota's typical county figure - Griggs County comes in 1.4 psf under it.
Griggs County, FIPS 38039, is home to 2,227 people near 47.4563°N 98.2323°W. Its 40 psf ground snow load figure is the map value; 28 psf is what a roof is actually designed for.
Griggs County's snowfall, most winters
42.2 in. a year: that's Griggs County's NOAA 1991-2020 snowfall normal, measured at COOPERSTOWN, ND US (9.7 mi away). See the density guide.
Before you rely on Griggs County's number
Treat the Griggs 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.