Heavy

ZIP Code 03046

Merrimack County, New Hampshire

60PSF (Ground Snow Load)
HeavyClassification

What This Means

Merrimack County, New Hampshire has a heavy ground snow load of 60 PSF per ASCE 7-22. This is a significant structural load. Roofs must be specifically engineered for this snow load. Consider snow guards, proper insulation to prevent ice dams, and roof designs that shed snow effectively.

Snow Load Details

ZIP Code03046
CountyMerrimack
City—
StateNew Hampshire (NH)
Ground Snow Load60 PSF — Heavy
Classification Range41 - 60 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): 60 PSF

Roof Snow Load: 42 PSF

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

Merrimack 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

03043 CS Case Study 03044 50 PSF Heavy 03045 60 PSF Heavy 03047 CS Case Study 03048 60 PSF Heavy 03049 60 PSF Heavy

Frequently Asked Questions

What is the ground snow load for ZIP code 03046?

ZIP code 03046 is in Merrimack County, New Hampshire, with a ground snow load of 60 PSF, classified as heavy per ASCE 7-22.

Is my roof strong enough for snow in 03046?

With a heavy ground snow load of 60 PSF, your roof must be specifically engineered for this load. Consult a structural engineer if building or renovating.

What county is ZIP code 03046 in?

ZIP code 03046 is in Merrimack County, New Hampshire (NH).