Our Pick
Posted on @rawstates
Hyatt Regency walkway collapse
July 17, 1981
Kansas City, Missouri
Public domain · Wikimedia Commons
Two suspended walkways fell into a crowded tea dance, killing 114, the deadliest structural failure in American history until 2001. A change to the rod detail doubled the load on a connection nobody rechecked. It is now taught in nearly every engineering ethics course.
That was 1 of the hidden places.
Location: documented spot
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