Dallam County, TX Roof Snow Load - 10 psf
Dallam County, TX: your roof's ASCE 7 snow number, in plain English
Dallam 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 Dallam 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. Standard residential construction handles a load this size without extra bracing; it is a modest addition on top of ordinary roof loading.
Dallam County, TX: quick facts
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#2,025 of 2,758
- Texas rank#29 of 254
- Population7,526
- Annual snowfall, NOAA normal20.3 in.
- FIPS48111
Dallam County by the numbers
Nationally that's #2,025 out of 2,758 rated counties, the top 73%; within Texas alone, Dallam County ranks #29 of 254. 5.4 psf is Texas's typical county figure - Dallam County beats it by 4.6 psf.
Dallam County, FIPS 48111, is home to 7,526 people near 36.2864°N 102.594°W. Its 10 psf ground snow load figure is the map value; 10 psf is what a roof is actually designed for.
Dallam County's snowfall, most winters
20.3 in. a year: that's Dallam County's NOAA 1991-2020 snowfall normal, measured at DALHART MUNI AP, TX US (18.8 mi away). See the density guide.
Before you rely on Dallam County's number
Treat the Dallam 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.