Dallas County, AR Roof Snow Load - 10 psf
What ASCE 7 says about snow load in Dallas County
That's Dallas 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. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.
Dallas County, AR: quick facts
- Design roof snow load10 psf
- Ground snow load, ASCE 7 map10 psf
- National rank#2,037 of 2,758
- Arkansas rank#68 of 75
- Population6,076
- Annual snowfall, NOAA normal1.6 in.
- FIPS05039
Where Dallas County's figure sits nationally
Out of 2,758 rated US counties, Dallas County sits at #2,037, the top 74% nationally - #68 of 75 within Arkansas. Arkansas counties average 10.1 psf; Dallas County runs 0.1 psf lower than that.
Near 33.9678°N 92.654°W, FIPS 05039: Dallas County counts 6,076 residents and a 10 psf map value, which the code's own factors turn into 10 psf.
How much it actually snows in Dallas County
Most winters bring Dallas County roughly 1.6 in. of snow - NOAA's normal at SPARKMAN, AR US, 10.5 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Dallas 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 Dallas County's county-wide figure. (How this figure is calculated.)