[VTenigma]

I don’t think this was a Hyatt style deal. There was no live load and no dynamic live load. If you recall the Hyatt incident was precipitated by a high live dynamic load ( people at a party filling the spans and dancing).

The mechanism of failure was structure fatigue of the horizontal members at the vertical tie-ins. The vertical support members were to be continuous so each individual span was supported independently, instead the erectors hung the verticals from the flanges of the channel above, meaning the flange on the top span carried the load of all the lower spans and the flange failed. That was a failure induced by the constructors.

IMHO the Miami failure was an engineering failure. The engineering firm must have specified the methodology here and that was lacking safety margins.

[Beach333]

The Hyatt changes to the vertical were approved by the engineers when they reviewed the shop drawings. The engineer was eventually found guilty if I remember my ethics courses correctly.

[frog in a pot]

Your description of the Hyatt failure is correct, of course. The reference was based on my understanding that the engineer reviewing the shop drawings had spilled coffee on that detail and it was missed. Admittedly, that may have been someone's joke.