Fremont County, WY Roof Snow Load - 15 psf
Fremont County, WY roof snow load, translated
A typical heated home in Fremont County is designed to carry 15 pounds per square foot of snow on its roof, per ASCE 7-22. ASCE 7's low-slope-roof minimum (§7.3.4) raises the governing figure to 15 psf - higher than the 10.5 psf the ground-load formula alone would give, and the code says use the larger one.
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. 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.
Fremont County in numbers
- Design roof snow load15 psf
- Ground snow load, ASCE 7 map15 psf
- National rank#1,399 of 2,758
- Wyoming rank#11 of 18
- Population39,721
- Annual snowfall, NOAA normal44.3 in.
- FIPS56013
Where Fremont County ranks
#11 of 18 Wyoming counties by design load, top 51% of 2,758 nationally - that's Fremont County's spot. 17.5 psf is Wyoming's typical county figure - Fremont County comes in 2.5 psf under it.
FIPS 56013, population 39,721, centered near 43.0548°N 108.6089°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.
Fremont County: average annual snowfall
Fremont County sees about 44.3 in. of snow most winters, per the RIVERTON, WY US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Fremont 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.