Danville city, VA Roof Snow Load - 20 psf
Danville city, VA roof snow load, translated
A typical heated home in Danville city is designed to carry 20 pounds per square foot of snow on its roof, per ASCE 7-22. §7.3.4's low-slope minimum of 20 psf is what actually governs on a flat or low-pitch roof here - higher than the 14 psf the base ground-load formula gives.
On a roof that means 44 in. of fresh snow, 16 in. once it packs down, or 4 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.
Danville city at a glance
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#776 of 2,758
- Virginia rank#33 of 110
- Population41,993
- Annual snowfall, NOAA normal8.8 in.
- FIPS51590
Where Danville city ranks
#33 of 110 Virginia counties by design load, top 28% of 2,758 nationally - that's Danville city's spot. Virginia counties average 18.3 psf; Danville city runs 1.7 psf higher than that.
FIPS 51590, population 41,993, centered near 36.5833°N 79.4081°W. ASCE 7's underlying ground snow load here is 20 psf before the code's exposure and importance factors bring it to the 20 psf design figure above.
Danville city: average annual snowfall
Danville city sees about 8.8 in. of snow most winters, per the YANCEYVILLE 4 SE, NC US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Danville city'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. Details: the calculation guide.