The Two Words That Killed 114 People: The Hyatt Regency Walkways and the Math of the Load Path

On the evening of July 17th, 1981, about two thousand people were dancing in the atrium of a brand-new luxury hotel in Kansas City.

The Hyatt Regency had a lobby that was, by the standards of the time, breathtaking - a soaring glass-roofed space four stories tall, with three walkways suspended in the open air above the dance floor, one stacked above the other, hanging from the ceiling on slender steel rods. People stood on those walkways to watch the party below. They were beautiful. They were a year old. And at about seven o'clock that evening, two of them - one hanging directly above the other - tore loose from the ceiling and fell, fully loaded with people, onto the crowd in the atrium.

CHAPTERS
00:00 Cold open
01:00 Scene 1: The atrium and the rods
05:30 Scene 2: The detail that changed
09:30 Scene 3: The box beam and the nut
14:30 Scene 4: Why the box beam could not hold
21:00 Scene 5: The equation, in full
27:00 Scene 6: Nineteen seconds
33:00 Scene 7: The signature, and the system that failed
39:00 Scene 8: The pattern
43:00 Scene 9: What it means to compute the world
44:30 Closing

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Видео The Two Words That Killed 114 People: The Hyatt Regency Walkways and the Math of the Load Path канала Strange Equations