Extreme

ZIP Code 03218

Belknap County, New Hampshire — Barnstead

80PSF (Ground Snow Load)
ExtremeClassification

What This Means

Belknap County, New Hampshire 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 Code03218
CountyBelknap
CityBarnstead
StateNew Hampshire (NH)
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.

Belknap 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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03215 CS Case Study 03216 CS Case Study 03217 CS Case Study 03219 CS Case Study 03220 80 PSF Extreme 03221 CS Case Study

Frequently Asked Questions

What is the ground snow load for ZIP code 03218?

ZIP code 03218 is in Belknap County, New Hampshire, with a ground snow load of 80 PSF, classified as extreme per ASCE 7-22.

Is my roof strong enough for snow in 03218?

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 03218 in?

ZIP code 03218 is in Belknap County, New Hampshire (NH).