Rowan County, NC Roof Snow Load - 10 psf
How much snow is too much for a roof in Rowan County, NC?
10 psf: that's what ASCE 7-22 requires a typical heated home's roof in Rowan County to carry. 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.
Picture it, not just weigh it: 22 in. if it's fresh powder, 8 in. once it settles, or a mere 2 in. if it's ice. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.
Rowan County at a glance
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,689 of 2,758
- North Carolina rank#60 of 100
- Population153,384
- Annual snowfall, NOAA normal2.4 in.
- FIPS37159
How Rowan County compares
10 psf ranks #1,689 of 2,758 US counties with a mapped snow load (top 61%) - and #60 of 100 in North Carolina. That's 2.9 psf below North Carolina's own county-average design load of 12.9 psf.
Population 153,384 (FIPS 37159), roughly 35.6414°N 80.5217°W. The 10 psf ground snow load ASCE 7-22 maps here becomes 10 psf once the code's own design factors are applied.
Typical snowfall in Rowan County, NC
NOAA's 30-year normal for Rowan County: 2.4 in. of snow a year, from the SALISBURY, NC US station. (fresh vs. packed vs. ice explains why.)
What this Rowan County figure assumes
This is a county-level reference figure for a typical heated home built to Risk Category II (ordinary residential), on a partially exposed lot - the assumptions ASCE 7-22 itself treats as the default case. A steeper roof, a fully exposed hilltop lot, an unheated structure, or a higher risk category all change the actual number.
Rowan County's permit office wants an address-specific figure, not this county average - the ASCE 7 Hazard Tool is free, takes under a minute, and outputs a PDF most reviewers accept. Details: the calculation guide.