Miami condo collapse

[URY914]

I can image a lot of condo boards were having emergency meetings over last weekend.
I won't want to the a board chairman these days.

[masraum]

Originally Posted by greglepore

You can't build on plastic sand in a corrosive environment.

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Originally Posted by LEAKYSEALS951

I would not stand foot in Burj Khalifa, even for a second. Same for the highrises that are measurably settling where ever they are.

Single story Ranch style living has it's advantages.

There are a bunch of those man-made "palm tree" islands. I'm not sure how many are complete and have building/inhabitants, but I definitely think they are probably even more fool hardy than the Titanic. A giant man-made island built in water out of sand in a seismically active area with enormously tall buildings built on it. I'm guessing Dubai hasn't ever heard the parable of "wise and foolish builders" (building your house on sand or rock).

I did find it interesting that they used an enormous dildo to compact the sand used to build the island prior to building. I kind of feel that means that those islands are fuched from the outset.

Originally Posted by David

https://www.insider.com/woman-was-on-phone-to-husband-as-miami-block-collapsed-2021-6


A woman stood on the balcony of her fourth-floor apartment as the Florida condominium collapsed told her husband on the phone that she could see the pool "caving in" seconds before the line went dead, Sky News reported.

Cassie Straton was speaking to her husband, Michael, from their balcony on the south side of the Champlain Towers when she noticed the building started shaking in the early hours of Thursday, her older sister Ashely Dean said.

"Suddenly she says, 'honey, the pool is caving in. The pool is sinking to the ground,'" Dean said, according to Sky News.

"He said, 'what are you talking about?' And she says, 'the ground is shaking, everything's shaking' and then she screamed a blood-curdling scream and the line went dead," Dean added.

That's really horrifying. I can't even imagine the psychological impact of that phone call on the husband for the rest of his life.

[wilnj]

Originally Posted by masraum

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There are a bunch of those man-made "palm tree" islands. I'm not sure how many are complete and have building/inhabitants, but I definitely think they are probably even more fool hardy than the Titanic. A giant man-made island built in water out of sand in a seismically active area with enormously tall buildings built on it. I'm guessing Dubai hasn't ever heard the parable of "wise and foolish builders" (building your house on sand or rock).

I did find it interesting that they used an enormous dildo to compact the sand used to build the island prior to building. I kind of feel that means that those islands are fuched from the outset.




That's really horrifying. I can't even imagine the psychological impact of that phone call on the husband for the rest of his life.

Burj Khalifa is not on one of the islands. The bedrock under it isn’t Manhattan quality which means it’s on piles but it’s not on a man made island.


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[dad911]

I don't see cables either. The parking garage appears to extend under the pool deck and almost up to the pool. I read they are going to analyze the other sister buildings. I wonder how/if they are monitoring the section that hasn't collapsed(yet).

[masraum]

Originally Posted by wilnj

Burj Khalifa is not on one of the islands. The bedrock under it isn’t Manhattan quality which means it’s on piles but it’s not on a man made island.


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Ah, OK, well, that's a step up.

I probably wouldn't want to be in either the BK or any of the high rises on the man-made islands.

[wilnj]

Originally Posted by dad911

I don't see cables either. The parking garage appears to extend under the pool deck and almost up to the pool. I read they are going to analyze the other sister buildings. I wonder how/if they are monitoring the section that hasn't collapsed(yet).

I’m certainly no expert on hi rise residential nor post tensioned concrete but my understanding of post tension is that it’s called for when there are large unsupported slabs. You wouldn’t need that in a residential tower that has lots of interior partitions.


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[javadog]

Originally Posted by wilnj

I’m certainly no expert on hi rise residential nor post tensioned concrete but my understanding of post tension is that it’s called for when there are large unsupported slabs. You wouldn’t need that in a residential tower that has lots of interior partitions.


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Most interior partitions in most high rise buildings are not load bearing.

Post tensioned cables can reduce deflections in large spans if installed correctly.

Frankly, rebar could do a better job with deflections if it were installed differently.

[hcoles]

Some brief searching on the life of concrete... the number 100 years often comes up.
The point is concrete has a finite life. Of course it lasts longer with proper design, construction and care. At some point in the near future very many buildings and structures will need to be replaced. I wonder if this incident will bring that up to the public.

[LEAKYSEALS951]

I'd like to see some before pics of this area. Looks like entire parking lot/patio pancaked onto lower parking deck/basement of some sort.

My comments about Burj K. were more about pushing the boundaries of cement/rebar too far. This seems more foundation related.

[javadog]

This is not good. Something that too many architects, engineers and builders don't give enough thought to:

[Salty Springs]

Originally Posted by javadog

This is not good. Something that too many architects, engineers and builders don't give enough thought to:

The amount of weight (also seen in other pics)riding on 2' columns is astronomical. I wonder what was attached to those columns that you have arrowed?

[GH85Carrera]

Originally Posted by hcoles

Some brief searching on the life of concrete... the number 100 years often comes up.
The point is concrete has a finite life. Of course it lasts longer with proper design, construction and care. At some point in the near future very many buildings and structures will need to be replaced. I wonder if this incident will bring that up to the public.

How is it that so many Roman sites, made from concrete are still standing after 2,000 years?

So the Empire State building will need to be torn down soon? It is 90 years old.

[javadog]

Originally Posted by Salty Springs

The amount of weight (also seen in other pics)riding on 2' columns is astronomical. I wonder what was attached to those columns that you have arrowed?

That’s where the parking lot slab used to be. It has fallen 7 or 8 feet, after completely separating from the columns.

[wilnj]

Originally Posted by javadog

Most interior partitions in most high rise buildings are not load bearing.

Correct but interior partitions are great for burying columns.


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[javadog]

Originally Posted by wilnj

Correct but interior partitions are great for burying columns.


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They still aren't load bearing...

[wilnj]

Originally Posted by javadog

They still aren't load bearing...

No, the columns that can be hidden in the walls are load bearing.


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[javadog]

Originally Posted by wilnj

No, the columns that can be hidden in the walls are load bearing.


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No ****, Sherlock.

[wilnj]

Originally Posted by javadog

No ****, Sherlock.

So then what was your point?


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[john70t]

Looks like the ground itself collapsed into a sinkhole.

At first I though those were just to hold up a wrap-around walkway, but that could be the corner of the building.

[javadog]

Originally Posted by wilnj

So then what was your point?

Really? Geebus...

Originally Posted by wilnj

Correct but interior partitions are great for burying columns.

Originally Posted by javadog

They still aren't load bearing...

Originally Posted by wilnj

No, the columns that can be hidden in the walls are load bearing.

Originally Posted by javadog

No ****, Sherlock.

You implied that the distance between supports for the floor slabs was likely less than needed (ad thus obviating the need for post tensioned cables) because of the presence of interior partitions. That is only true if the interior partitions are load bearing.

I pointed out that most interior partitions were not load bearing.

You then said you could hide a column in them.

See if you can figure it out from there. It's too stupid for me to spend any more time on it.