Western Connecticut Planning Region, CT Snow Load: 21 psf

Western Connecticut Planning Region, CT roof snow load, translated

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. 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.

Western Connecticut Planning Region, CT: quick facts

• Design roof snow load21 psf
• Ground snow load, ASCE 7 map30 psf
• National rank#385 of 2,758
• Connecticut rank#5 of 9
• Population637,013
• Annual snowfall, NOAA normal49.3 in.
• FIPS09190

Where Western Connecticut Planning Region ranks

#5 of 9 Connecticut counties by design load, top 14% of 2,758 nationally - that's Western Connecticut Planning Region's spot. 22.6 psf is Connecticut's typical county figure - Western Connecticut Planning Region comes in 1.6 psf under it.

FIPS 09190, population 637,013, centered near 41.2791°N 73.4466°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.

Western Connecticut Planning Region: average annual snowfall

Western Connecticut Planning Region sees about 49.3 in. of snow most winters, per the DANBURY, CT US station's 1991-2020 NOAA normal. See the density guide.

Read this before you use Western Connecticut Planning Region'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.)