Cass County, ND Roof Snow Load - 35 psf
What ASCE 7 says about snow load in Cass County
That's Cass County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from.
Converted to something you can actually eyeball on a roof: about 77 in. of fresh powder, 28 in. once it settles and packs down, or just 7 in. if it's turned to ice. This is a serious structural load - older homes built before modern snow-load provisions, or ones with low-slope or flat roof sections, are worth having checked.
Cass County, ND: quick facts
- Design roof snow load35 psf
- Ground snow load, ASCE 7 map50 psf
- National rank#98 of 2,758
- North Dakota rank#6 of 49
- Population200,945
- Annual snowfall, NOAA normal36.7 in.
- FIPS38017
Where Cass County's figure sits nationally
Out of 2,758 rated US counties, Cass County sits at #98, the top 4% nationally - #6 of 49 within North Dakota. That's 5.6 psf above North Dakota's own county-average design load of 29.4 psf.
Near 46.927°N 97.2524°W, FIPS 38017: Cass County counts 200,945 residents and a 50 psf map value, which the code's own factors turn into 35 psf.
How much it actually snows in Cass County
Most winters bring Cass County roughly 36.7 in. of snow - NOAA's normal at CASSELTON AGRONOMY FARM, ND US, 3.6 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Cass County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.
Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Cass County's county-wide figure. Details: the calculation guide.