Moderate

ZIP Code 59003

Powder River County, Montana — Ashland

25PSF (Ground Snow Load)
ModerateClassification

What This Means

Powder River County, Montana 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 Code59003
CountyPowder River
CityAshland
StateMontana (MT)
Ground Snow Load25 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): 25 PSF

Roof Snow Load: 17.5 PSF

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

Powder River 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

59001 CS Case Study 59002 20 PSF Light 59004 25 PSF Moderate 59006 20 PSF Light

Frequently Asked Questions

What is the ground snow load for ZIP code 59003?

ZIP code 59003 is in Powder River County, Montana, with a ground snow load of 25 PSF, classified as moderate per ASCE 7-22.

Is my roof strong enough for snow in 59003?

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 59003 in?

ZIP code 59003 is in Powder River County, Montana (MT).