Gibson County, TN Roof Snow Load - 10 psf
What ASCE 7 says about snow load in Gibson County
That's Gibson County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. 7 psf is what the ground-load formula alone gives; Gibson 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.
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. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.
Gibson County, TN: quick facts
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,777 of 2,758
- Tennessee rank#35 of 95
- Population51,422
- Annual snowfall, NOAA normal3 in.
- FIPS47053
Where Gibson County's figure sits nationally
Out of 2,758 rated US counties, Gibson County sits at #1,777, the top 64% nationally - #35 of 95 within Tennessee. 10.3 psf is Tennessee's typical county figure - Gibson County comes in 0.3 psf under it.
Near 35.9916°N 88.9338°W, FIPS 47053: Gibson County counts 51,422 residents and a 10 psf map value, which the code's own factors turn into 10 psf.
How much it actually snows in Gibson County
Most winters bring Gibson County roughly 3 in. of snow - NOAA's normal at MILAN EXP STN, TN US, 12.3 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Gibson 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 Gibson County's county-wide figure. See the methodology guide.