St. Mary Parish, LA Roof Snow Load - 0 psf
St. Mary Parish, LA: your roof's ASCE 7 snow number, in plain English
St. Mary Parish's roofs are built to hold 0 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 0 inches of fresh, light snow, 0 inches of old, settled snow, or as little as 0 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. Snow load is not a factor in roof design here at all; the ground snow load figure maps to zero.
St. Mary Parish in numbers
- Design roof snow load0 psf
- Ground snow load, ASCE 7 map0 psf
- National rank#2,617 of 2,758
- Louisiana rank#48 of 64
- Population46,799
- Annual snowfall, NOAA normal0 in.
- FIPS22101
St. Mary Parish by the numbers
Nationally that's #2,617 out of 2,758 rated counties, the top 95%; within Louisiana alone, St. Mary Parish ranks #48 of 64. That's 2.4 psf below Louisiana's own county-average design load of 2.4 psf.
St. Mary Parish, FIPS 22101, is home to 46,799 people near 29.6293°N 91.4638°W. Its 0 psf ground snow load figure is the map value; 0 psf is what a roof is actually designed for.
St. Mary Parish's snowfall, most winters
0 in. a year: that's St. Mary Parish's NOAA 1991-2020 snowfall normal, measured at FRANKLIN 3 NW, LA US (14.2 mi away). See the density guide.
Before you rely on St. Mary Parish's number
Treat the St. Mary Parish 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. Details: the calculation guide.