Perry County, TN Roof Snow Load - 10 psf
How much snow is too much for a roof in Perry County, TN?
10 psf: that's what ASCE 7-22 requires a typical heated home's roof in Perry 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. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.
Perry County, TN: quick facts
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#2,009 of 2,758
- Tennessee rank#88 of 95
- Population8,987
- Annual snowfall, NOAA normal2.1 in.
- FIPS47135
How Perry County compares
10 psf ranks #2,009 of 2,758 US counties with a mapped snow load (top 73%) - and #88 of 95 in Tennessee. 10.3 psf is Tennessee's typical county figure - Perry County comes in 0.3 psf under it.
Population 8,987 (FIPS 47135), roughly 35.6638°N 87.8693°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 Perry County, TN
NOAA's 30-year normal for Perry County: 2.1 in. of snow a year, from the LINDEN WTP, TN US station. (fresh vs. packed vs. ice explains why.)
What this Perry 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.
Perry 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.