SnowLoadCheck

Granville County, NC Roof Snow Load - 15 psf

Granville County, NC roof snow load, translated

Moderate
15 psf

A typical heated home in Granville County is designed to carry 15 pounds per square foot of snow on its roof, per ASCE 7-22. Flat and low-pitch roofs in Granville County are actually governed by ASCE 7's §7.3.4 minimum of 15 psf, not the 10.5 psf the ground-load formula alone would produce.

On a roof that means 33 in. of fresh snow, 12 in. once it packs down, or 3 in. of solid ice - three very different piles for the same load. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.

Snow on Granville County's roofs right now?

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Granville County in numbers

Where Granville County ranks

#32 of 100 North Carolina counties by design load, top 50% of 2,758 nationally - that's Granville County's spot. That's 2.1 psf above North Carolina's own county-average design load of 12.9 psf.

FIPS 37077, population 61,544, centered near 36.2999°N 78.6576°W. ASCE 7's underlying ground snow load here is 15 psf before the code's exposure and importance factors bring it to the 15 psf design figure above.

Granville County: average annual snowfall

Granville County sees about 1.7 in. of snow most winters, per the BUTNER FLTR PLT, NC US station's 1991-2020 NOAA normal. See the density guide.

Read this before you use Granville 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.)