Sullivan County, PA Roof Snow Load - 21 psf
Sullivan County, PA roof snow load, translated
A typical heated home in Sullivan County is designed to carry 21 pounds per square foot of snow on its roof, per ASCE 7-22.
On a roof that means 46.2 in. of fresh snow, 16.8 in. once it packs down, or 4.2 in. of solid ice - three very different piles for the same load. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.
Sullivan County in numbers
- Design roof snow load21 psf
- Ground snow load, ASCE 7 map30 psf
- National rank#478 of 2,758
- Pennsylvania rank#23 of 38
- Population5,927
- Annual snowfall, NOAA normal69.7 in.
- FIPS42113
Where Sullivan County ranks
#23 of 38 Pennsylvania counties by design load, top 17% of 2,758 nationally - that's Sullivan County's spot. That's 0.1 psf above Pennsylvania's own county-average design load of 20.9 psf.
FIPS 42113, population 5,927, centered near 41.4393°N 76.5117°W. ASCE 7's underlying ground snow load here is 30 psf before the code's exposure and importance factors bring it to the 21 psf design figure above.
Sullivan County: average annual snowfall
Sullivan County sees about 69.7 in. of snow most winters, per the LAPORTE, PA US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Sullivan County's figure
The figure above assumes the case ASCE 7-22 treats as typical: a heated, ordinary-occupancy home on a partially exposed site. Change any of those - exposure, heating, roof pitch, occupancy category - and the real design number moves.
A building permit needs the number at your exact address, not the county average - the free ASCE 7 Hazard Tool returns that from your coordinates in about a minute and produces a PDF a plan reviewer will accept. (How this figure is calculated.)