How XL Construction built a building on top of a building in an earthquake zone
Construction Dive
JULY 1, 2025
Built in the heart of Cal’s campus in the Berkeley Hills overlooking San Francisco Bay — an area prone to seismic activity — the 35,500-square-foot structure was sited on top of a 45-year-old library that had shifted up to 8 inches from its original location over the years. This interview has been edited for brevity and clarity.
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