Newton County, MS Roof Snow Load - 5 psf
Newton County, MS roof snow load, translated
A typical heated home in Newton County is designed to carry 5 pounds per square foot of snow on its roof, per ASCE 7-22. 3.5 psf is what the ground-load formula alone gives; Newton County's 5 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 11 in. of fresh snow, 4 in. once it packs down, or 1 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.
Newton County in numbers
- Design roof snow load5 psf
- Ground snow load, ASCE 7 map5 psf
- National rank#2,287 of 2,758
- Mississippi rank#53 of 82
- Population21,063
- Annual snowfall, NOAA normal0.4 in.
- FIPS28101
Where Newton County ranks
#53 of 82 Mississippi counties by design load, top 83% of 2,758 nationally - that's Newton County's spot. Mississippi counties average 6.5 psf; Newton County runs 1.5 psf lower than that.
FIPS 28101, population 21,063, centered near 32.402°N 89.1184°W. ASCE 7's underlying ground snow load here is 5 psf before the code's exposure and importance factors bring it to the 5 psf design figure above.
Newton County: average annual snowfall
Newton County sees about 0.4 in. of snow most winters, per the NEWTON EXP STN, MS US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Newton 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.