Dillon County, SC Roof Snow Load - 10 psf
What ASCE 7 says about snow load in Dillon County
That's Dillon County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. The physics-based figure alone would be 7 psf, but ASCE 7's own low-slope minimum (§7.3.4) sets a floor of 10 psf for flat and low-pitch roofs here, which is the number that actually governs.
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. A modest addition to standard roof loading. Ordinary residential construction handles this without extra bracing.
Dillon County in numbers
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,858 of 2,758
- South Carolina rank#27 of 46
- Population27,577
- Annual snowfall, NOAA normal0.8 in.
- FIPS45033
Where Dillon County's figure sits nationally
Out of 2,758 rated US counties, Dillon County sits at #1,858, the top 67% nationally - #27 of 46 within South Carolina. 8.8 psf is South Carolina's typical county figure - Dillon County beats it by 1.2 psf.
Near 34.3902°N 79.3752°W, FIPS 45033: Dillon County counts 27,577 residents and a 10 psf map value, which the code's own factors turn into 10 psf.
How much it actually snows in Dillon County
Most winters bring Dillon County roughly 0.8 in. of snow - NOAA's normal at DILLON, SC US, 1.7 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Dillon 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 Dillon County's county-wide figure. See the methodology guide.