Moderate

ZIP Code 51243

Lyon County, Iowa — Little Rock

40PSF (Ground Snow Load)
ModerateClassification

What This Means

Lyon County, Iowa 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 Code51243
CountyLyon
CityLittle Rock
StateIowa (IA)
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.

Lyon 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

51240 40 PSF Moderate 51241 40 PSF Moderate 51242 40 PSF Moderate 51244 35 PSF Moderate 51245 35 PSF Moderate 51246 40 PSF Moderate

Frequently Asked Questions

What is the ground snow load for ZIP code 51243?

ZIP code 51243 is in Lyon County, Iowa, with a ground snow load of 40 PSF, classified as moderate per ASCE 7-22.

Is my roof strong enough for snow in 51243?

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 51243 in?

ZIP code 51243 is in Lyon County, Iowa (IA).