Montgomery County, MS Roof Snow Load - 10 psf
Montgomery County, MS roof snow load, translated
A typical heated home in Montgomery County is designed to carry 10 pounds per square foot of snow on its roof, per ASCE 7-22. 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.
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. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.
Montgomery County, MS: quick facts
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#2,005 of 2,758
- Mississippi rank#29 of 82
- Population9,411
- Annual snowfall, NOAA normal0.8 in.
- FIPS28097
Where Montgomery County ranks
#29 of 82 Mississippi counties by design load, top 73% of 2,758 nationally - that's Montgomery County's spot. Mississippi counties average 6.5 psf; Montgomery County runs 3.5 psf higher than that.
FIPS 28097, population 9,411, centered near 33.5007°N 89.6396°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.
Montgomery County: average annual snowfall
Montgomery County sees about 0.8 in. of snow most winters, per the WINONA 5 E, MS US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Montgomery 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. (How this figure is calculated.)