Crawford County, IN Roof Snow Load - 15 psf
Crawford County, IN roof snow load, translated
A typical heated home in Crawford County is designed to carry 15 pounds per square foot of snow on its roof, per ASCE 7-22. §7.3.4's low-slope minimum of 15 psf is what actually governs on a flat or low-pitch roof here - higher than the 10.5 psf the base ground-load formula gives.
On a roof that means 33 in. of fresh snow, 12 in. once it packs down, or 3 in. of solid ice - three very different piles for the same load. 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.
Snow on Crawford County's roofs right now?
Crawford County at a glance
- Design roof snow load15 psf
- Ground snow load, ASCE 7 map15 psf
- National rank#1,550 of 2,758
- Indiana rank#89 of 89
- Population10,523
- Annual snowfall, NOAA normal13.6 in.
- FIPS18025
Where Crawford County ranks
#89 of 89 Indiana counties by design load, top 56% of 2,758 nationally - that's Crawford County's spot. That's 4.3 psf below Indiana's own county-average design load of 19.3 psf.
FIPS 18025, population 10,523, centered near 38.2894°N 86.4409°W. ASCE 7's underlying ground snow load here is 15 psf before the code's exposure and importance factors bring it to the 15 psf design figure above.
Crawford County: average annual snowfall
Crawford County sees about 13.6 in. of snow most winters, per the SHOALS 8 S, IN US station's 1991-2020 NOAA normal. 26.4 mi is a real gap between Crawford County and its nearest reporting station, so local snowfall can diverge from this figure, especially near elevation changes. See the density guide.
Read this before you use Crawford 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. (How this figure is calculated.)