Lauderdale County, TN Roof Snow Load - 10 psf
Lauderdale County, TN roof snow load, translated
A typical heated home in Lauderdale County is designed to carry 10 pounds per square foot of snow on its roof, per ASCE 7-22. 7 psf is what the ground-load formula alone gives; Lauderdale 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.
On a roof that means 22 in. of fresh snow, 8 in. once it packs down, or 2 in. of solid ice - three very different piles for the same load. A modest addition to standard roof loading. Ordinary residential construction handles this without extra bracing.
Lauderdale County, TN: quick facts
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,881 of 2,758
- Tennessee rank#63 of 95
- Population24,630
- Annual snowfall, NOAA normal2.4 in.
- FIPS47097
Where Lauderdale County ranks
#63 of 95 Tennessee counties by design load, top 68% of 2,758 nationally - that's Lauderdale County's spot. 10.3 psf is Tennessee's typical county figure - Lauderdale County comes in 0.3 psf under it.
FIPS 47097, population 24,630, centered near 35.763°N 89.6277°W. ASCE 7's underlying ground snow load here is 10 psf before the code's exposure and importance factors bring it to the 10 psf design figure above.
Lauderdale County: average annual snowfall
Lauderdale County sees about 2.4 in. of snow most winters, per the COVINGTON 3 SW, TN US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Lauderdale County's figure
The figure above assumes the case ASCE 7-22 treats as typical: a heated, ordinary-occupancy home on a partially exposed site. Change any of those - exposure, heating, roof pitch, occupancy category - and the real design number moves.
A building permit needs the number at your exact address, not the county average - the free ASCE 7 Hazard Tool returns that from your coordinates in about a minute and produces a PDF a plan reviewer will accept. Details: the calculation guide.