ZIP Code 99660
Aleutians West County, Alaska — Saint Paul Islan
What This Means
Aleutians West County, Alaska has a moderate ground snow load of 40 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 | 99660 |
| County | Aleutians West |
| City | Saint Paul Islan |
| State | Alaska (AK) |
| Ground Snow Load | 40 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): 40 PSF
ⓘ Simplified estimate for flat roofs. Sloped roofs, drift zones, and unbalanced loads need additional calculations. Consult a structural engineer for final design.
Aleutians West 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 99660?
ZIP code 99660 is in Aleutians West County, Alaska, with a ground snow load of 40 PSF, classified as moderate per ASCE 7-22.
Is my roof strong enough for snow in 99660?
With a moderate ground snow load of 40 PSF, standard residential construction typically handles this load, but verify with your local building code.
What county is ZIP code 99660 in?
ZIP code 99660 is in Aleutians West County, Alaska (AK).