Extreme

ZIP Code 49918

Keweenaw County, Michigan — Copper Harbor

100PSF (Ground Snow Load)
ExtremeClassification

What This Means

Keweenaw County, Michigan has an extreme ground snow load of 100 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 Code49918
CountyKeweenaw
CityCopper Harbor
StateMichigan (MI)
Ground Snow Load100 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): 100 PSF

Roof Snow Load: 70 PSF

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

Keweenaw 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

49915 60 PSF Heavy 49916 70 PSF Extreme 49917 90 PSF Extreme 49919 60 PSF Heavy 49920 60 PSF Heavy 49921 80 PSF Extreme

Frequently Asked Questions

What is the ground snow load for ZIP code 49918?

ZIP code 49918 is in Keweenaw County, Michigan, with a ground snow load of 100 PSF, classified as extreme per ASCE 7-22.

Is my roof strong enough for snow in 49918?

With a extreme ground snow load of 100 PSF, your roof must be specifically engineered for this load. Consult a structural engineer if building or renovating.

What county is ZIP code 49918 in?

ZIP code 49918 is in Keweenaw County, Michigan (MI).