Robeson County, NC Roof Snow Load - 10 psf
Robeson County, NC roof snow load, translated
A typical heated home in Robeson County is designed to carry 10 pounds per square foot of snow on its roof, per ASCE 7-22. 7 psf is what the ground-load formula alone gives; Robeson County's 10 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 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.
Robeson County in numbers
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,702 of 2,758
- North Carolina rank#63 of 100
- Population118,624
- Annual snowfall, NOAA normal0.4 in.
- FIPS37155
Where Robeson County ranks
#63 of 100 North Carolina counties by design load, top 62% of 2,758 nationally - that's Robeson County's spot. North Carolina counties average 12.9 psf; Robeson County runs 2.9 psf lower than that.
FIPS 37155, population 118,624, centered near 34.6392°N 79.1009°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.
Robeson County: average annual snowfall
Robeson County sees about 0.4 in. of snow most winters, per the RED SPRINGS 1 SE, NC US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Robeson 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. Details: the calculation guide.