ZIP Code 91901
San Diego County, California — Alpine
What This Means
San Diego County, California has a ground snow load of 0 PSF per ASCE 7-22. This area has negligible snow accumulation for structural design purposes. Standard roof construction without special snow load provisions is typically sufficient.
Snow Load Details
| ZIP Code | 91901 |
| County | San Diego |
| City | Alpine |
| State | California (CA) |
| Ground Snow Load | 0 PSF — No Snow Load |
| Classification Range | 21 - 40 PSF |
| Data Quality | Elevation estimated |
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): 0 PSF
ⓘ Simplified estimate for flat roofs. Sloped roofs, drift zones, and unbalanced loads need additional calculations. Consult a structural engineer for final design.
San Diego 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 91901?
ZIP code 91901 is in San Diego County, California, with a ground snow load of 0 PSF, classified as no snow load per ASCE 7-22.
Is my roof strong enough for snow in 91901?
With no significant snow load in this area, standard roof construction is typically sufficient.
What county is ZIP code 91901 in?
ZIP code 91901 is in San Diego County, California (CA).