The Anchor That Wasn't Built to Hold: How the Wrong Epoxy Brought Down Boston's Big Dig
In July 2006, 26 tons of concrete ceiling panels collapsed inside Boston's I-90 Connector Tunnel, killing one and injuring another. The NTSB investigation confirmed the cause: the wrong type of epoxy was used to anchor the hanger bolts. Fast-set epoxy creeps under sustained deadweight load. The right anchor would have held for decades.
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