Extreme

ZIP Code 49905

Houghton County, Michigan — Atlantic Mine

80PSF (Ground Snow Load)
ExtremeClassification

What This Means

Houghton County, Michigan has an extreme ground snow load of 80 PSF per ASCE 7-22. This requires robust structural engineering with heavy-duty framing. Snow removal plans, snow guards, and reinforced roof systems are essential. Consult a licensed structural engineer for any construction.

Snow Load Details

ZIP Code49905
CountyHoughton
CityAtlantic Mine
StateMichigan (MI)
Ground Snow Load80 PSF — Extreme
Classification Range61+ 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): 80 PSF

Roof Snow Load: 56 PSF

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

Houghton County Snow Load Map

Counties colored by snow load classification. Gray = No Load, Blue = Light, Amber = Moderate, Orange = Heavy, Red = Extreme, Purple = Case Study.

New Lookup

Check Another ZIP Code

Nearby ZIP Codes

49902 60 PSF Heavy 49903 60 PSF Heavy 49908 70 PSF Extreme

Frequently Asked Questions

What is the ground snow load for ZIP code 49905?

ZIP code 49905 is in Houghton County, Michigan, with a ground snow load of 80 PSF, classified as extreme per ASCE 7-22.

Is my roof strong enough for snow in 49905?

With a extreme ground snow load of 80 PSF, your roof must be specifically engineered for this load. Consult a structural engineer if building or renovating.

What county is ZIP code 49905 in?

ZIP code 49905 is in Houghton County, Michigan (MI).