ZIP Code 57521
Mellette County, South Dakota — Belvidere
What This Means
Mellette County, South Dakota has a moderate ground snow load of 25 PSF per ASCE 7-22. This load requires proper structural consideration during design. Roof framing, trusses, and connections should be engineered for this snow load. Ensure adequate drainage to prevent ponding.
Snow Load Details
| ZIP Code | 57521 |
| County | Mellette |
| City | Belvidere |
| State | South Dakota (SD) |
| Ground Snow Load | 25 PSF — Moderate |
| Classification Range | 21 - 40 PSF |
| Data Quality | Measured |
Source: ASCE 7-22 ground snow load polygons via ArcGIS
Roof Snow Load Calculator
ASCE 7-22 flat roof formula: pf = 0.7 × Ce × Ct × Is × pg
Your ground snow load (pg): 25 PSF
ⓘ Simplified estimate for flat roofs. Sloped roofs, drift zones, and unbalanced loads need additional calculations. Consult a structural engineer for final design.
Mellette County Snow Load Map
Counties colored by snow load classification. Gray = No Load, Blue = Light, Amber = Moderate, Orange = Heavy, Red = Extreme, Purple = Case Study.
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Frequently Asked Questions
What is the ground snow load for ZIP code 57521?
ZIP code 57521 is in Mellette County, South Dakota, with a ground snow load of 25 PSF, classified as moderate per ASCE 7-22.
Is my roof strong enough for snow in 57521?
With a moderate ground snow load of 25 PSF, standard residential construction typically handles this load, but verify with your local building code.
What county is ZIP code 57521 in?
ZIP code 57521 is in Mellette County, South Dakota (SD).