Light

ZIP Code 57778

Pennington County, South Dakota — Rochford

20PSF (Ground Snow Load)
LightClassification

What This Means

Pennington County, South Dakota has a light ground snow load of 20 PSF per ASCE 7-22. At this level, most standard residential roofs are designed to handle the load without issue. However, flat or low-slope roofs should still be checked for drifting and sliding snow.

Snow Load Details

ZIP Code57778
CountyPennington
CityRochford
StateSouth Dakota (SD)
Ground Snow Load20 PSF — Light
Classification Range1 - 20 PSF
Data QualityCounty fallback

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): 20 PSF

Roof Snow Load: 14 PSF

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

Pennington 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 57778?

ZIP code 57778 is in Pennington County, South Dakota, with a ground snow load of 20 PSF, classified as light per ASCE 7-22.

Is my roof strong enough for snow in 57778?

With a light ground snow load of 20 PSF, standard residential construction typically handles this load, but verify with your local building code.

What county is ZIP code 57778 in?

ZIP code 57778 is in Pennington County, South Dakota (SD).