Stone County, MO Roof Snow Load - 15 psf
Stone County, MO roof snow load, translated
A typical heated home in Stone County is designed to carry 15 pounds per square foot of snow on its roof, per ASCE 7-22. 10.5 psf is what the ground-load formula alone gives; Stone County's 15 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 33 in. of fresh snow, 12 in. once it packs down, or 3 in. of solid ice - three very different piles for the same load. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.
Stone County, MO: quick facts
- Design roof snow load15 psf
- Ground snow load, ASCE 7 map15 psf
- National rank#1,420 of 2,758
- Missouri rank#96 of 115
- Population32,630
- Annual snowfall, NOAA normal11.9 in.
- FIPS29209
Where Stone County ranks
#96 of 115 Missouri counties by design load, top 51% of 2,758 nationally - that's Stone County's spot. 18.6 psf is Missouri's typical county figure - Stone County comes in 3.6 psf under it.
FIPS 29209, population 32,630, centered near 36.7458°N 93.4578°W. ASCE 7's underlying ground snow load here is 15 psf before the code's exposure and importance factors bring it to the 15 psf design figure above.
Stone County: average annual snowfall
Stone County sees about 11.9 in. of snow most winters, per the BILLINGS 1SW, MO US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Stone 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. See the methodology guide.