SnowLoadCheck

Marshall County, TN Roof Snow Load - 10 psf

What ASCE 7 says about snow load in Marshall County

Light
10 psf

That's Marshall County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. The physics-based figure alone would be 7 psf, but ASCE 7's own low-slope minimum (§7.3.4) sets a floor of 10 psf for flat and low-pitch roofs here, which is the number that actually governs.

Converted to something you can actually eyeball on a roof: about 22 in. of fresh powder, 8 in. once it settles and packs down, or just 2 in. if it's turned to ice. This is a modest add-on to standard roof loading - ordinary residential construction carries it without extra bracing.

Marshall County at a glance

Where Marshall County's figure sits nationally

Out of 2,758 rated US counties, Marshall County sits at #1,812, the top 66% nationally - #43 of 95 within Tennessee. 10.3 psf is Tennessee's typical county figure - Marshall County comes in 0.3 psf under it.

Near 35.4683°N 86.7659°W, FIPS 47117: Marshall County counts 37,847 residents and a 10 psf map value, which the code's own factors turn into 10 psf.

How much it actually snows in Marshall County

Most winters bring Marshall County roughly 0.9 in. of snow - NOAA's normal at LEWISBURG EXP STN, TN US, 4.5 mi off. (fresh vs. packed vs. ice explains why.)

Read this before you rely on it

Marshall County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.

Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Marshall County's county-wide figure. (How this figure is calculated.)