ZIP Code 99571
Aleutians East County, Alaska — Nelson Lagoon
What This Means
Aleutians East County, Alaska 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 Code | 99571 |
| County | Aleutians East |
| City | Nelson Lagoon |
| State | Alaska (AK) |
| Ground Snow Load | 25 PSF — Moderate |
| Classification Range | 21 - 40 PSF |
| Data Quality | Measured |
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
ⓘ Simplified estimate for flat roofs. Sloped roofs, drift zones, and unbalanced loads need additional calculations. Consult a structural engineer for final design.
Aleutians East 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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Frequently Asked Questions
What is the ground snow load for ZIP code 99571?
ZIP code 99571 is in Aleutians East County, Alaska, with a ground snow load of 25 PSF, classified as moderate per ASCE 7-22.
Is my roof strong enough for snow in 99571?
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 99571 in?
ZIP code 99571 is in Aleutians East County, Alaska (AK).