Clarendon County, SC Roof Snow Load - 10 psf
What ASCE 7 says about snow load in Clarendon County
That's Clarendon County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. 7 psf is what the ground-load formula alone gives; Clarendon County's 10 psf low-slope minimum (§7.3.4) beats it, so that figure is the one that governs on flat and low-pitch roofs.
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. Standard residential construction handles a load this size without extra bracing; it is a modest addition on top of ordinary roof loading.
Clarendon County in numbers
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#1,836 of 2,758
- South Carolina rank#23 of 46
- Population31,030
- Annual snowfall, NOAA normal0.5 in.
- FIPS45027
Where Clarendon County's figure sits nationally
Out of 2,758 rated US counties, Clarendon County sits at #1,836, the top 67% nationally - #23 of 46 within South Carolina. That's 1.2 psf above South Carolina's own county-average design load of 8.8 psf.
Near 33.6647°N 80.2179°W, FIPS 45027: Clarendon County counts 31,030 residents and a 10 psf map value, which the code's own factors turn into 10 psf.
How much it actually snows in Clarendon County
Most winters bring Clarendon County roughly 0.5 in. of snow - NOAA's normal at MANNING, SC US, 2.6 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Clarendon 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 Clarendon County's county-wide figure. See the methodology guide.