Roberts County, TX Roof Snow Load - 20 psf
Roberts County, TX roof snow load, translated
A typical heated home in Roberts County is designed to carry 20 pounds per square foot of snow on its roof, per ASCE 7-22. Flat and low-pitch roofs in Roberts County are actually governed by ASCE 7's §7.3.4 minimum of 20 psf, not the 14 psf the ground-load formula alone would produce.
On a roof that means 44 in. of fresh snow, 16 in. once it packs down, or 4 in. of solid ice - three very different piles for the same load. Modern-code homes carry a load like this without issue; an older addition, a carport, or any flat-roofed section is where it is worth checking first.
Roberts County in numbers
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#1,293 of 2,758
- Texas rank#5 of 254
- Population837
- Annual snowfall, NOAA normal13.4 in.
- FIPS48393
Where Roberts County ranks
#5 of 254 Texas counties by design load, top 47% of 2,758 nationally - that's Roberts County's spot. Texas counties average 5.4 psf; Roberts County runs 14.6 psf higher than that.
FIPS 48393, population 837, centered near 35.8386°N 100.8367°W. ASCE 7's underlying ground snow load here is 20 psf before the code's exposure and importance factors bring it to the 20 psf design figure above.
Roberts County: average annual snowfall
Roberts County sees about 13.4 in. of snow most winters, per the MIAMI, TX US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Roberts County's figure
The figure above assumes the case ASCE 7-22 treats as typical: a heated, ordinary-occupancy home on a partially exposed site. Change any of those - exposure, heating, roof pitch, occupancy category - and the real design number moves.
A building permit needs the number at your exact address, not the county average - the free ASCE 7 Hazard Tool returns that from your coordinates in about a minute and produces a PDF a plan reviewer will accept. (How this figure is calculated.)