The Hyatt Regency walkway collapse was caused by a seemingly simple change: a two-rod fix that doubled the load on the fourth-floor connection. In this video, we trace the original detail, the buildable fix, and why nobody re-ran the numbers before the disaster on 17 July 1981. Chapters: 00:00 A FORTY-FOOT THREAD 00:18 The buildable fix 00:30 Nobody re-ran it





