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 10 months ago
Comments
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.