Blaine County, OK Roof Snow Load - 10 psf
Blaine County, OK roof snow load, translated
A typical heated home in Blaine County is designed to carry 10 pounds per square foot of snow on its roof, per ASCE 7-22. The physics-based figure alone would be 7 psf, but ASCE 7's own low-slope minimum (§7.3.4) sets a floor of 10 psf for flat and low-pitch roofs here, which is the number that actually governs.
On a roof that means 22 in. of fresh snow, 8 in. once it packs down, or 2 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.
Blaine County at a glance
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#2,010 of 2,758
- Oklahoma rank#65 of 77
- Population8,573
- Annual snowfall, NOAA normal10.3 in.
- FIPS40011
Where Blaine County ranks
#65 of 77 Oklahoma counties by design load, top 73% of 2,758 nationally - that's Blaine County's spot. Oklahoma counties average 11 psf; Blaine County runs 1 psf lower than that.
FIPS 40011, population 8,573, centered near 35.8778°N 98.429°W. ASCE 7's underlying ground snow load here is 10 psf before the code's exposure and importance factors bring it to the 10 psf design figure above.
Blaine County: average annual snowfall
Blaine County sees about 10.3 in. of snow most winters, per the OKEENE, OK US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Blaine 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.