Henry County, TN Roof Snow Load - 10 psf
How much snow is too much for a roof in Henry County, TN?
10 psf: that's what ASCE 7-22 requires a typical heated home's roof in Henry County to carry. 7 psf is what the ground-load formula alone gives; Henry 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.
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.
Henry County in numbers
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,829 of 2,758
- Tennessee rank#50 of 95
- Population32,883
- Annual snowfall, NOAA normal5.2 in.
- FIPS47079
How Henry County compares
10 psf ranks #1,829 of 2,758 US counties with a mapped snow load (top 66%) - and #50 of 95 in Tennessee. That's 0.3 psf below Tennessee's own county-average design load of 10.3 psf.
Population 32,883 (FIPS 47079), roughly 36.3253°N 88.3003°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 Henry County, TN
NOAA's 30-year normal for Henry County: 5.2 in. of snow a year, from the PARIS 2 SE, TN US station. (fresh vs. packed vs. ice explains why.)
What this Henry 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.
Henry 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.)