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Miami Beach building collapse 4

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hpaircraft

hpaircraft

Member
Mar 23, 2018
106
Not a good year for engineering in Miami:


From the CNN article:

CNN said:
The building that collapsed at 5775 Collins Ave. was the 12-story Marlborough House, which was scheduled for demolition to make way for a new condo building, according to The Next Miami, a news site focusing on real estate.
Police said there was a demolition permit on file for the site, but not an implosion permit. Demolition refers to the general process of tearing down a building, while implosion is specific to the use of explosives to quickly bring down a structure.
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I'm interested in why the paper did not also include "annihilation - the use of tactical nukes to vaporize a building." Maybe it was vocabulary day in the press pool.

I wonder if someone earlier in the process asked "Is this structural?" and got the answer "Naw, just cut it."
 
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That looks like an intentional collapse; there's at least a dozen people standing around all looking in the direction of the building it collapses. It looks like a bulldozer or something similar is pulling on some cables just before the collapse. The street on the opposite side is clearly blocked off in the second video on that page.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
 
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Crazy how slow the guy is to react to the huge building collapsing.
His buddy nopes out of there real quick while the other dude sits there for a second.

Very sad, but RUNNNN damnit.
 
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The equipment had a chain/cable pulling on something when it all came down. You can see it straighten up and lift off the ground.

The injured man certainly didn't look like he expected the building to collapse, standing so close to it - even after the structure began to come down.

He appears to raise his arm in some kind of gesture before beginning to run away.

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Ok. I strike my earlier statement. This certainly was planned and intentional. And stupid.

Is there anything about collapsing an entire building in that tight of a space that is remotely "conventional?"
 
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Spartan5 said:
Ok. I strike my earlier statement. This certainly was planned and intentional. And stupid.
Click to expand...
I don't believe it was intentional, at least not at that time. There are vehicles parked right next to the property.

Brad

It's all okay as long as it's okay.
 
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Does the demo contractor get paid his full fee?

Dik
 
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It looks pretty intentional to me, there is a hose spray going on and many people lined up on the pavement watching it.

I suppose in essence this wasn't an implosion as there were no apparent explosives involved, but that D9 pulling a central support down.

I think the main building structure collapsed pretty well as intended, but what looks like the central stairwell or lift shaft was a bit more solid and suddenly stands proud of the rest and tips part of the building into the road.

Standing that close does seem nigh on suicidal though.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
 
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I get the impression that the contractor thought it was going to be a walk in the park. The updated article states that they had issued warnings to neighbors that demolition of building was to commence yesterday morning, so...

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
 
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Expecting the collapse or not right at that time, they were doing something pulling with the dozer that was questionable enough they had left the building to watch it happen at a distance.

It also appears they were expecting to eventually drop the building like that based on how the bottom floor had been demolished down to the pillars while the other floors were more complete.
 
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Certainly looked like a "planned implosion", sans explosives. Whatever it was that hit him, his hard hat sure went flying. Any news on his condition?

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
 
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In a separate video there is a small chunk that hits his leg and spins him around, followed by what looks like a 3ft by 3ft piece, probably concrete, that sent him flying across the road. It looks like it hit him even with the shoulders on down. I'm a bit surprised it didn't kill him.
 
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Rapid collapses generate truckloads of kinetic energy. I recall seeing a video of an implosion where chunks flew by bystanders that were supposedly at a safe distance. While our skulls are hard, they are not impenetrable.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
 
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Long ago, I worked for a dump-truck company that did a fair bit of demolition like this.
They probably wouldn't have done this job due to the tight surroundings.
But, if more open, weaken it at the bottom and pull at the top.
There was a lot of judgment involved, but NO actual engineering.
So not surprising that something could be done like this, or that it could go wrong.
 
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I have yet to see the vid with the D9 pulling, (not supported formats)
but the phrase

"easier to ask forgiveness than get permission"....Oops

came to me
 
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A few sequenced clips from the video
Sequence_1_dnwa1w.jpg


Sequence_2_o3hj7m.jpg


Sequence_3_exu3j9.jpg


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