Moderate

ZIP Code 59011

Sweet Grass County, Montana — Big Timber

25PSF (Ground Snow Load)
ModerateClassification

What This Means

Sweet Grass 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 Code59011
CountySweet Grass
CityBig Timber
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.

Sweet Grass 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

59008 CS Case Study 59010 20 PSF Light 59012 25 PSF Moderate 59013 25 PSF Moderate 59014 20 PSF Light

Frequently Asked Questions

What is the ground snow load for ZIP code 59011?

ZIP code 59011 is in Sweet Grass 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 59011?

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 59011 in?

ZIP code 59011 is in Sweet Grass County, Montana (MT).