SnowLoadCheck

Campbell County, TN Roof Snow Load - 10 psf

How much snow is too much for a roof in Campbell County, TN?

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10 psf

10 psf: that's what ASCE 7-22 requires a typical heated home's roof in Campbell County to carry. The physics-based figure alone would be 7 psf, but ASCE 7's own low-slope minimum (§7.3.4) sets a floor of 10 psf for flat and low-pitch roofs here, which is the number that actually governs.

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. A modest addition to standard roof loading. Ordinary residential construction handles this without extra bracing.

Already snow on the roof in Campbell County?

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Campbell County in numbers

How Campbell County compares

10 psf ranks #1,805 of 2,758 US counties with a mapped snow load (top 65%) - and #42 of 95 in Tennessee. 10.3 psf is Tennessee's typical county figure - Campbell County comes in 0.3 psf under it.

Population 40,238 (FIPS 47013), roughly 36.4016°N 84.1592°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 Campbell County, TN

NOAA's 30-year normal for Campbell County: 3.1 in. of snow a year, from the NORRIS, TN US station. (fresh vs. packed vs. ice explains why.)

What this Campbell 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.

Campbell 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. (How this figure is calculated.)