Hard Rock Hotel collapse

That cell phone video of it happening was crazy! Wonder why that guy was sitting in his car videoing? Guess he was just videoing the on-going crane work and happened to catch it collapsing?
 
Hard Rock anything is still a thing.

Who knew?
 
That cell phone video of it happening was crazy! Wonder why that guy was sitting in his car videoing? Guess he was just videoing the on-going crane work and happened to catch it collapsing?
My guess is he saw a smaller collapse begin it all. Like the top floor dropped first and caused the domino effect.
 
Structural integrity has been exceed.
Wonder if the lower foors were poured properly.
 
My guess is he saw a smaller collapse begin it all. Like the top floor dropped first and caused the domino effect.

Yeah, looking again, it appears that the top corner was sagging already when the video started. This vid will be helpful in the root cause analysis!
 
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Dollars to donuts this was an assembly issue. There are specialized structural engineers that analyze a high rise for its stability during construction. Kind of like building a solid building before the real building. It helps optimize construction ops and gets the building up quicker. The fact that we don’t see more in-progress collapses is tell-tale that the method is solid—but the possibility of someone doing something stupid during assembly is very high. Even a simple mistake that caused a chain reaction.
 
What he said ^^^^^^^. If the contractor ignores assembly sequence he is just damn stupid. I tried stopping it by frame but I'm too slow.

Would like to know if they had final connections tightened and torque checked per level before the subsequent erections began. Improper torque is bad juju and cumulative. I always had ECS or S&ME on site checking both welded and bolted connections. Had at least 3 breaks on poured in place.

This is going to be a really costly ride for the contractor and subs, possibly for the structural dude. Luckily in 48 years of construction and construction management my contractors and subs never had a major incident.

Just to add I worked with some damn fine A/E's, contractors and subs. I also ran off the bad ones...................
 
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