Chesterfield County, SC Roof Snow Load - 10 psf
What ASCE 7 says about snow load in Chesterfield County
That's Chesterfield County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. Flat and low-pitch roofs in Chesterfield County are actually governed by ASCE 7's §7.3.4 minimum of 10 psf, not the 7 psf the ground-load formula alone would produce.
Converted to something you can actually eyeball on a roof: about 22 in. of fresh powder, 8 in. once it settles and packs down, or just 2 in. if it's turned to ice. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.
Chesterfield County, SC: quick facts
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,792 of 2,758
- South Carolina rank#20 of 46
- Population44,488
- Annual snowfall, NOAA normal0.5 in.
- FIPS45025
Where Chesterfield County's figure sits nationally
Out of 2,758 rated US counties, Chesterfield County sits at #1,792, the top 65% nationally - #20 of 46 within South Carolina. That's 1.2 psf above South Carolina's own county-average design load of 8.8 psf.
Near 34.637°N 80.1592°W, FIPS 45025: Chesterfield County counts 44,488 residents and a 10 psf map value, which the code's own factors turn into 10 psf.
How much it actually snows in Chesterfield County
Most winters bring Chesterfield County roughly 0.5 in. of snow - NOAA's normal at HARTSVILLE, SC US, 17.9 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Chesterfield 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 Chesterfield County's county-wide figure. See the methodology guide.