Extreme

ZIP Code 03853

Carroll County, New Hampshire — Mirror Lake

90PSF (Ground Snow Load)
ExtremeClassification

What This Means

Carroll County, New Hampshire has an extreme ground snow load of 90 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 Code03853
CountyCarroll
CityMirror Lake
StateNew Hampshire (NH)
Ground Snow Load90 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): 90 PSF

Roof Snow Load: 63 PSF

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

Carroll 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

03850 90 PSF Extreme 03851 80 PSF Extreme 03852 80 PSF Extreme 03854 50 PSF Heavy 03855 80 PSF Extreme 03856 50 PSF Heavy

Frequently Asked Questions

What is the ground snow load for ZIP code 03853?

ZIP code 03853 is in Carroll County, New Hampshire, with a ground snow load of 90 PSF, classified as extreme per ASCE 7-22.

Is my roof strong enough for snow in 03853?

With a extreme ground snow load of 90 PSF, your roof must be specifically engineered for this load. Consult a structural engineer if building or renovating.

What county is ZIP code 03853 in?

ZIP code 03853 is in Carroll County, New Hampshire (NH).