Hardin County, TN Roof Snow Load - 10 psf
What ASCE 7 says about snow load in Hardin County
That's Hardin County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. Flat and low-pitch roofs in Hardin County are actually governed by ASCE 7's §7.3.4 minimum of 10 psf, not the 7 psf the ground-load formula alone would produce.
Converted to something you can actually eyeball on a roof: about 22 in. of fresh powder, 8 in. once it settles and packs down, or just 2 in. if it's turned to ice. A modest addition to standard roof loading. Ordinary residential construction handles this without extra bracing.
Hardin County at a glance
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,856 of 2,758
- Tennessee rank#57 of 95
- Population27,617
- Annual snowfall, NOAA normal1 in.
- FIPS47071
Where Hardin County's figure sits nationally
Out of 2,758 rated US counties, Hardin County sits at #1,856, the top 67% nationally - #57 of 95 within Tennessee. 10.3 psf is Tennessee's typical county figure - Hardin County comes in 0.3 psf under it.
Near 35.2019°N 88.1857°W, FIPS 47071: Hardin County counts 27,617 residents and a 10 psf map value, which the code's own factors turn into 10 psf.
How much it actually snows in Hardin County
Most winters bring Hardin County roughly 1 in. of snow - NOAA's normal at SELMER, TN US, 23.5 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Hardin County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.
Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Hardin County's county-wide figure. (How this figure is calculated.)