Blanco County, TX Roof Snow Load - 5 psf
Blanco County, TX roof snow load, translated
A typical heated home in Blanco County is designed to carry 5 pounds per square foot of snow on its roof, per ASCE 7-22. 3.5 psf is what the ground-load formula alone gives; Blanco County's 5 psf low-slope minimum (§7.3.4) beats it, so that figure is the one that governs on flat and low-pitch roofs.
On a roof that means 11 in. of fresh snow, 4 in. once it packs down, or 1 in. of solid ice - three very different piles for the same load. Standard residential construction handles a load this size without extra bracing; it is a modest addition on top of ordinary roof loading.
Snow on Blanco County's roofs right now?
Blanco County at a glance
- Design roof snow load5 psf
- Ground snow load, ASCE 7 map5 psf
- National rank#2,352 of 2,758
- Texas rank#150 of 254
- Population13,358
- Annual snowfall, NOAA normal0.1 in.
- FIPS48031
Where Blanco County ranks
#150 of 254 Texas counties by design load, top 85% of 2,758 nationally - that's Blanco County's spot. Texas counties average 5.4 psf; Blanco County runs 0.4 psf lower than that.
FIPS 48031, population 13,358, centered near 30.2662°N 98.3993°W. ASCE 7's underlying ground snow load here is 5 psf before the code's exposure and importance factors bring it to the 5 psf design figure above.
Blanco County: average annual snowfall
Blanco County sees about 0.1 in. of snow most winters, per the HYE, TX US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Blanco 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. See the methodology guide.