Washita County, OK Roof Snow Load - 10 psf
Washita County, OK: your roof's ASCE 7 snow number, in plain English
Washita 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 Washita 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. A modest addition to standard roof loading. Ordinary residential construction handles this without extra bracing.
Already snow on the roof in Washita County?
Washita County in numbers
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,989 of 2,758
- Oklahoma rank#61 of 77
- Population10,839
- Annual snowfall, NOAA normal6.4 in.
- FIPS40149
Washita County by the numbers
Nationally that's #1,989 out of 2,758 rated counties, the top 72%; within Oklahoma alone, Washita County ranks #61 of 77. That's 1 psf below Oklahoma's own county-average design load of 11 psf.
Washita County, FIPS 40149, is home to 10,839 people near 35.2899°N 98.9923°W. Its 10 psf ground snow load figure is the map value; 10 psf is what a roof is actually designed for.
Washita County's snowfall, most winters
6.4 in. a year: that's Washita County's NOAA 1991-2020 snowfall normal, measured at CORDELL, OK US (0.8 mi away). See the density guide.
Before you rely on Washita County's number
Treat the Washita 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.