SnowLoadCheck

Clinton County, MO Roof Snow Load - 20 psf

Clinton County, MO roof snow load, translated

Moderate
20 psf

A typical heated home in Clinton County is designed to carry 20 pounds per square foot of snow on its roof, per ASCE 7-22. Flat and low-pitch roofs in Clinton County are actually governed by ASCE 7's §7.3.4 minimum of 20 psf, not the 14 psf the ground-load formula alone would produce.

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.

Got real snow on a Clinton County roof right now?

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Clinton County, MO: quick facts

Where Clinton County ranks

#38 of 115 Missouri counties by design load, top 34% of 2,758 nationally - that's Clinton County's spot. 18.6 psf is Missouri's typical county figure - Clinton County beats it by 1.4 psf.

FIPS 29049, population 21,721, centered near 39.6087°N 94.3958°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.

Clinton County: average annual snowfall

Clinton County sees about 14.1 in. of snow most winters, per the POLO, MO US station's 1991-2020 NOAA normal. See the density guide.

Read this before you use Clinton 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. See the methodology guide.