Hudson County, NJ Roof Snow Load - 20 psf
Hudson County, NJ roof snow load, translated
A typical heated home in Hudson County is designed to carry 20 pounds per square foot of snow on its roof, per ASCE 7-22. The physics-based figure alone would be 14 psf, but ASCE 7's own low-slope minimum (§7.3.4) sets a floor of 20 psf for flat and low-pitch roofs here, which is the number that actually governs.
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. Modern-code homes carry a load like this without issue; an older addition, a carport, or any flat-roofed section is where it is worth checking first.
Hudson County at a glance
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#520 of 2,758
- New Jersey rank#6 of 17
- Population736,185
- Annual snowfall, NOAA normal31.5 in.
- FIPS34017
Where Hudson County ranks
#6 of 17 New Jersey counties by design load, top 19% of 2,758 nationally - that's Hudson County's spot. That's 0.1 psf below New Jersey's own county-average design load of 20.1 psf.
FIPS 34017, population 736,185, centered near 40.7314°N 74.0786°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.
Hudson County: average annual snowfall
Hudson County sees about 31.5 in. of snow most winters, per the NEWARK INTL AP, NJ US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use Hudson 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. Details: the calculation guide.