Itawamba County, MS Roof Snow Load - 10 psf
How much snow is too much for a roof in Itawamba County, MS?
10 psf: that's what ASCE 7-22 requires a typical heated home's roof in Itawamba County to carry. 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.
Picture it, not just weigh it: 22 in. if it's fresh powder, 8 in. once it settles, or a mere 2 in. if it's ice. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.
Itawamba County in numbers
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,884 of 2,758
- Mississippi rank#17 of 82
- Population24,198
- Annual snowfall, NOAA normal1.6 in.
- FIPS28057
How Itawamba County compares
10 psf ranks #1,884 of 2,758 US counties with a mapped snow load (top 68%) - and #17 of 82 in Mississippi. That's 3.5 psf above Mississippi's own county-average design load of 6.5 psf.
Population 24,198 (FIPS 28057), roughly 34.2811°N 88.3631°W. The 10 psf ground snow load ASCE 7-22 maps here becomes 10 psf once the code's own design factors are applied.
Typical snowfall in Itawamba County, MS
NOAA's 30-year normal for Itawamba County: 1.6 in. of snow a year, from the FULTON 3 W, MS US station. (fresh vs. packed vs. ice explains why.)
What this Itawamba County figure assumes
This is a county-level reference figure for a typical heated home built to Risk Category II (ordinary residential), on a partially exposed lot - the assumptions ASCE 7-22 itself treats as the default case. A steeper roof, a fully exposed hilltop lot, an unheated structure, or a higher risk category all change the actual number.
Itawamba County's permit office wants an address-specific figure, not this county average - the ASCE 7 Hazard Tool is free, takes under a minute, and outputs a PDF most reviewers accept. Details: the calculation guide.