Ziebach County, SD Roof Snow Load - 28 psf
Ziebach County, SD roof snow load, translated
A typical heated home in Ziebach County is designed to carry 28 pounds per square foot of snow on its roof, per ASCE 7-22.
On a roof that means 61.6 in. of fresh snow, 22.4 in. once it packs down, or 5.6 in. of solid ice - three very different piles for the same load. This is a meaningful design load - most modern-code homes handle it fine, though an addition, a carport or a flat-roofed section can be a weak spot.
Ziebach County in numbers
- Design roof snow load28 psf
- Ground snow load, ASCE 7 map40 psf
- National rank#291 of 2,758
- South Dakota rank#39 of 65
- Population2,418
- Annual snowfall, NOAA normal40.7 in.
- FIPS46137
Where Ziebach County ranks
#39 of 65 South Dakota counties by design load, top 11% of 2,758 nationally - that's Ziebach County's spot. 28.2 psf is South Dakota's typical county figure - Ziebach County comes in 0.2 psf under it.
FIPS 46137, population 2,418, centered near 44.9898°N 101.6608°W. ASCE 7's underlying ground snow load here is 40 psf before the code's exposure and importance factors bring it to the 28 psf design figure above.
Ziebach County: average annual snowfall
Ziebach County sees about 40.7 in. of snow most winters, per the DUPREE, SD US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Ziebach 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.)