Graham County, AZ Roof Snow Load - 0 psf
Graham County, AZ: your roof's ASCE 7 snow number, in plain English
Graham County's roofs are built to hold 0 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 0 inches of fresh, light snow, 0 inches of old, settled snow, or as little as 0 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. Snow load is not a factor in roof design here at all; the ground snow load figure maps to zero.
Graham County at a glance
- Design roof snow load0 psf
- Ground snow load, ASCE 7 map0 psf
- National rank#2,627 of 2,758
- Arizona rank#12 of 13
- Population40,242
- Annual snowfall, NOAA normal0.2 in.
- FIPS04009
Graham County by the numbers
Nationally that's #2,627 out of 2,758 rated counties, the top 95%; within Arizona alone, Graham County ranks #12 of 13. Arizona counties average 0.4 psf; Graham County runs 0.4 psf lower than that.
Graham County, FIPS 04009, is home to 40,242 people near 32.9318°N 109.8783°W. Its 0 psf ground snow load figure is the map value; 0 psf is what a roof is actually designed for.
Graham County's snowfall, most winters
0.2 in. a year: that's Graham County's NOAA 1991-2020 snowfall normal, measured at SAFFORD AG CTR, AZ US (14 mi away). See the density guide.
Before you rely on Graham County's number
Treat the Graham 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.