Moderate

ZIP Code 57520

Sully County, South Dakota — Agar

40PSF (Ground Snow Load)
ModerateClassification

What This Means

Sully County, South Dakota has a moderate ground snow load of 40 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 Code57520
CountySully
CityAgar
StateSouth Dakota (SD)
Ground Snow Load40 PSF — Moderate
Classification Range21 - 40 PSF
Data QualityMeasured

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): 40 PSF

Roof Snow Load: 28 PSF

ⓘ Simplified estimate for flat roofs. Sloped roofs, drift zones, and unbalanced loads need additional calculations. Consult a structural engineer for final design.

Sully 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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Nearby ZIP Codes

57521 25 PSF Moderate 57522 40 PSF Moderate 57523 40 PSF Moderate

Frequently Asked Questions

What is the ground snow load for ZIP code 57520?

ZIP code 57520 is in Sully County, South Dakota, with a ground snow load of 40 PSF, classified as moderate per ASCE 7-22.

Is my roof strong enough for snow in 57520?

With a moderate ground snow load of 40 PSF, standard residential construction typically handles this load, but verify with your local building code.

What county is ZIP code 57520 in?

ZIP code 57520 is in Sully County, South Dakota (SD).