SnowLoadCheck

Trigg County, KY Roof Snow Load - 15 psf

Trigg County, KY: your roof's ASCE 7 snow number, in plain English

Moderate
15 psf

Trigg County's roofs are built to hold 15 psf of snow, the ASCE 7-22 figure a permit reviewer checks first. The physics-based figure alone would be 10.5 psf, but ASCE 7's own low-slope minimum (§7.3.4) sets a floor of 15 psf for flat and low-pitch roofs here, which is the number that actually governs.

In depth, not weight: that's roughly 33 inches of fresh, light snow, 12 inches of old, settled snow, or as little as 3 inches of solid ice - snow that heavy is rare here but ice from a freeze-thaw cycle adds up far faster than the depth suggests. This is a meaningful design load - most modern-code homes handle it fine, though an addition, a carport or a flat-roofed section can be a weak spot.

Trigg County at a glance

Trigg County by the numbers

Nationally that's #1,507 out of 2,758 rated counties, the top 55%; within Kentucky alone, Trigg County ranks #81 of 120. 15.7 psf is Kentucky's typical county figure - Trigg County comes in 0.7 psf under it.

Trigg County, FIPS 21221, is home to 14,559 people near 36.8077°N 87.8587°W. Its 15 psf ground snow load figure is the map value; 15 psf is what a roof is actually designed for.

Trigg County's snowfall, most winters

5.2 in. a year: that's Trigg County's NOAA 1991-2020 snowfall normal, measured at HOPKINSVILLE, KY US (18.9 mi away). See the density guide.

Before you rely on Trigg County's number

Treat the Trigg County figure as a starting point, not a final answer: it assumes standard occupancy, a heated structure and a moderately sheltered site, per ASCE 7-22's own defaults. Exposed terrain, an unheated building or a steeper roof all shift the real number.

For a real application, skip the county number and go straight to the ASCE 7 Hazard Tool - enter your coordinates and it returns a site-specific figure a plan reviewer will recognize. See the methodology guide.