How XL Construction built a building on top of a building in an earthquake zone
Construction Dive
JULY 1, 2025
Published July 1, 2025 Joe Bousquin Senior Editor post share post print email license A rendering of the Grimes Engineering Center on the University of California campus in Berkeley, Calif. Structural continuity depended on precisely matching 20 existing concrete columns — despite discrepancies in 45-year-old documents and field conditions.
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