Perry County, AR Roof Snow Load - 10 psf
Perry County, AR roof snow load, translated
A typical heated home in Perry County is designed to carry 10 pounds per square foot of snow on its roof, per ASCE 7-22. ASCE 7's low-slope-roof minimum (§7.3.4) raises the governing figure to 10 psf - higher than the 7 psf the ground-load formula alone would give, and the code says use the larger one.
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. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.
Perry County in numbers
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,995 of 2,758
- Arkansas rank#55 of 75
- Population10,251
- Annual snowfall, NOAA normal1.4 in.
- FIPS05105
Where Perry County ranks
#55 of 75 Arkansas counties by design load, top 72% of 2,758 nationally - that's Perry County's spot. 10.1 psf is Arkansas's typical county figure - Perry County comes in 0.1 psf under it.
FIPS 05105, population 10,251, centered near 34.9464°N 92.9269°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.
Perry County: average annual snowfall
Perry County sees about 1.4 in. of snow most winters, per the PERRY, AR US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Perry 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.)