LaMoure County, ND Roof Snow Load - 28 psf
LaMoure County, ND roof snow load, translated
A typical heated home in LaMoure County is designed to carry 28 pounds per square foot of snow on its roof, per ASCE 7-22.
On a roof that means 61.6 in. of fresh snow, 22.4 in. once it packs down, or 5.6 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.
LaMoure County in numbers
- Design roof snow load28 psf
- Ground snow load, ASCE 7 map40 psf
- National rank#283 of 2,758
- North Dakota rank#23 of 49
- Population4,051
- Annual snowfall, NOAA normal45.5 in.
- FIPS38045
Where LaMoure County ranks
#23 of 49 North Dakota counties by design load, top 10% of 2,758 nationally - that's LaMoure County's spot. 29.4 psf is North Dakota's typical county figure - LaMoure County comes in 1.4 psf under it.
FIPS 38045, population 4,051, centered near 46.4642°N 98.5261°W. ASCE 7's underlying ground snow load here is 40 psf before the code's exposure and importance factors bring it to the 28 psf design figure above.
LaMoure County: average annual snowfall
LaMoure County sees about 45.5 in. of snow most winters, per the LA MOURE, ND US station's 1991-2020 NOAA normal. See the density guide.
Read this before you use LaMoure 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. Details: the calculation guide.