Snow Load in Maryland

24 counties — Average 23.6 PSF (Moderate)

6
15
3
Light (25.0%) Moderate (62.5%) Case Study (12.5%)
Light — 6 counties with 1–20 PSF. Standard roof construction is typically sufficient.
Moderate — 15 counties with 21–40 PSF. Roofs need reinforced framing to handle regular snow buildup.
Case Study — 3 counties where snow loads vary too much to assign one number. A licensed engineer must determine the load for your specific site.

Based on ASCE 7-22, the national standard for structural snow loads used by engineers and building codes across the US.

Maryland Snow Load Map

Counties colored by snow load classification.

Maryland

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All 24 Counties — By Snow Load

CountyClassificationSnow Load
Allegany Case Study Site Study
Anne Arundel Moderate 25 PSF
Baltimore Moderate 25 PSF
Baltimore Moderate 25 PSF
Calvert Moderate 25 PSF
Caroline Light 20 PSF
Carroll Moderate 25 PSF
Cecil Moderate 25 PSF
Charles Moderate 25 PSF
Dorchester Light 20 PSF
Frederick Moderate 25 PSF
Garrett Case Study Site Study
Harford Moderate 25 PSF
Howard Moderate 25 PSF
Kent Moderate 25 PSF
Montgomery Moderate 25 PSF
Prince George's Moderate 25 PSF
Queen Anne's Moderate 25 PSF
Somerset Light 20 PSF
St. Mary's Light 20 PSF
Talbot Moderate 25 PSF
Washington Case Study Site Study
Wicomico Light 20 PSF
Worcester Light 20 PSF

Source: ASCE 7-22 ground snow load data

Frequently Asked Questions

What is the snow load in Maryland?

Maryland has an average ground snow load of 23.6 PSF, classified as moderate. Out of 24 counties: 6 light, 15 moderate, 3 case study.

Which Maryland counties have the highest snow load?

3 counties require a site-specific case study. See the county table above for a complete breakdown.

How do I check snow load for my Maryland address?

Enter your ZIP code in the search box above to see your area's ASCE 7-22 ground snow load, classification, and roof snow load calculator.

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