I have a 120kW project in Northern California. I need to confirm the seismic zone for the building location in order to determine if we will need seismic anchors for our ballasted racking solution. Is there a particular resource or website that I can visit to calculate the seismic zone?
Are there some ballast manufacturers that are less likely to require seismic anchors because of their design/approach?
Submitted
11 years 3 months ago
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Usually it's the AHJ (Authority Having Jurisdiction) which requires seismic anchors, not the racking manufacturer. Here is an overview map of US seismic zones: https://www.usgs.gov/natural-hazards/earthquake-hazards/hazards Your local building department will tell you which seismic zone they require.