Irion County, TX Roof Snow Load - 5 psf
Irion County, TX: your roof's ASCE 7 snow number, in plain English
Irion County's roofs are built to hold 5 psf of snow, the ASCE 7-22 figure a permit reviewer checks first. §7.3.4's low-slope minimum of 5 psf is what actually governs on a flat or low-pitch roof here - higher than the 3.5 psf the base ground-load formula gives.
In depth, not weight: that's roughly 11 inches of fresh, light snow, 4 inches of old, settled snow, or as little as 1 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.
Irion County at a glance
- Design roof snow load5 psf
- Ground snow load, ASCE 7 map5 psf
- National rank#2,461 of 2,758
- Texas rank#198 of 254
- Population1,526
- Annual snowfall, NOAA normal0 in.
- FIPS48235
Irion County by the numbers
Nationally that's #2,461 out of 2,758 rated counties, the top 89%; within Texas alone, Irion County ranks #198 of 254. Texas counties average 5.4 psf; Irion County runs 0.4 psf lower than that.
Irion County, FIPS 48235, is home to 1,526 people near 31.3034°N 100.9813°W. Its 5 psf ground snow load figure is the map value; 5 psf is what a roof is actually designed for.
Irion County's snowfall, most winters
0 in. a year: that's Irion County's NOAA 1991-2020 snowfall normal, measured at FUNK RCH, TX US (16.2 mi away). See the density guide.
Before you rely on Irion County's number
Treat the Irion 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.