Moderate

ZIP Code 22120

Fairfax County, Virginia

25PSF (Ground Snow Load)
ModerateClassification

What This Means

Fairfax County, Virginia has a moderate ground snow load of 25 PSF per ASCE 7-22. This load requires proper structural consideration during design. Roof framing, trusses, and connections should be engineered for this snow load. Ensure adequate drainage to prevent ponding.

Snow Load Details

ZIP Code22120
CountyFairfax
City—
StateVirginia (VA)
Ground Snow Load25 PSF — Moderate
Classification Range21 - 40 PSF
Data QualityCounty fallback

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): 25 PSF

Roof Snow Load: 17.5 PSF

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

Fairfax 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

22117 30 PSF Moderate 22119 25 PSF Moderate 22121 25 PSF Moderate 22122 25 PSF Moderate 22123 25 PSF Moderate

Frequently Asked Questions

What is the ground snow load for ZIP code 22120?

ZIP code 22120 is in Fairfax County, Virginia, with a ground snow load of 25 PSF, classified as moderate per ASCE 7-22.

Is my roof strong enough for snow in 22120?

With a moderate ground snow load of 25 PSF, standard residential construction typically handles this load, but verify with your local building code.

What county is ZIP code 22120 in?

ZIP code 22120 is in Fairfax County, Virginia (VA).