Hertford County, NC Roof Snow Load - 10 psf
Hertford County, NC roof snow load, translated
A typical heated home in Hertford 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. A modest addition to standard roof loading. Ordinary residential construction handles this without extra bracing.
Hertford County, NC: quick facts
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,916 of 2,758
- North Carolina rank#87 of 100
- Population19,169
- Annual snowfall, NOAA normal0.6 in.
- FIPS37091
Where Hertford County ranks
#87 of 100 North Carolina counties by design load, top 69% of 2,758 nationally - that's Hertford County's spot. North Carolina counties average 12.9 psf; Hertford County runs 2.9 psf lower than that.
FIPS 37091, population 19,169, centered near 36.3635°N 76.9816°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.
Hertford County: average annual snowfall
Hertford County sees about 0.6 in. of snow most winters, per the LEWISTON, NC US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Hertford 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.