Chester County, TN Roof Snow Load - 10 psf
How much snow is too much for a roof in Chester County, TN?
10 psf: that's what ASCE 7-22 requires a typical heated home's roof in Chester 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.
Snow on Chester County's roofs right now?
Chester County in numbers
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,925 of 2,758
- Tennessee rank#73 of 95
- Population17,876
- Annual snowfall, NOAA normal1 in.
- FIPS47023
How Chester County compares
10 psf ranks #1,925 of 2,758 US counties with a mapped snow load (top 70%) - and #73 of 95 in Tennessee. Tennessee counties average 10.3 psf; Chester County runs 0.3 psf lower than that.
Population 17,876 (FIPS 47023), roughly 35.4203°N 88.6114°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 Chester County, TN
NOAA's 30-year normal for Chester County: 1 in. of snow a year, from the SELMER, TN US station. (fresh vs. packed vs. ice explains why.)
What this Chester 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.
Chester 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. See the methodology guide.