Miami Beach, Champlain Towers South apartment building collapse, Part 03 148

[SFCharlie]

A continuation of our discussion of this failure. Best to read the other threads first to avoid rehashing things already discussed.

Miami Beach, Champlain Towers South apartment building collapse

Miami Beach, Champlain Towers South apartment building collapse, Part 02

Thank you

SF Charlie
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[Retiredat46]

I'm pretty sure the first image behind the paywall shows this view, which was posted in the first part of this thread:

 

[Mark R]

I'm pretty sure the first image behind the paywall shows this view

Actually, you can view a limited number of articles behind the paywall without having to pay so most readers can go read the article.

 

[Roga50]

As suspected, the city is rushing like hell to have the demolition done. I hope those lawyers file an injunction. Corruption down here at it's best... Now trying to destroy the evidence, as some have stated above...

 

[Murph 9000]

For the roof loads, I estimate qty. 150 of 3-ton A/C units (in groups of a dozen) plus a couple cell repeaters and electrical panels. That looks like 33,000lbs of add-ons distributed across the roof.

The A/C condensers were there on the original 1979 plans, so hopefully would have been included in the original load engineering. Similarly for the big HVAC unit, although it did change from spanning 4 D–E columns to spanning 4 E–H columns in a revision during the original build. The modern replacement for the big HVAC just consolidated two separate units into a combined unit on the same frame, spanning the same columns.

 

[Roga50]

Wow!! Yesterday they were saying it would take weeks, but now it may be tomorrow. It must be in much worse shape that they thought earlier. This is the best of the terrible options, though. Too bad that we may never learn the real cause of the collapse.

What's in "worse shape" is several city officials' chances of staying out of prison if that building remains standing. It's the South Florida way.

That storm will do very little... We've seen many storms like this before, of similar strength and similar storm track, where we don't even get rain or a light breeze. The storm is an EXCUSE. I hope the news media starts asking questions. If they want to make these decisions, they need to be stepping aside and let a third party not related to the situation call the shots. And NOT DeSantis (who is the most corrupt governor in Florida history).

 

[warrenslo]

A couple comments on your model:
- Adjust all balconies for the curve.
- Adjust level 12 and Penthouse balconies they are different.
- At x12 the balconies are different starting at floor 9.
- You are missing the step in the slab between the building and pool deck.

 

[Roga50]

Actually, you can view a limited number of articles behind the paywall without having to pay so most readers can go read the article.

Depending on the site (Miami Herald is one of them), you can just delete the site's cookies if the paywall starts asking you to log in, and then close your browser and hit the site again.

 

[warrenslo]

That storm will do very little... We've seen many storms like this before, of similar strength and similar storm track, where we don't even get rain or a light breeze. The storm is an EXCUSE. I hope the news media starts asking questions. If they want to make these decisions, they need to be stepping aside and let a third party not related to the situation call the shots. And NOT DeSantis (who is the most corrupt governor in Florida history).

I agree, looks like a cover-up. Why no more info on the roof inspection less than 24 hours prior?

The remaining building is solid - it's still standing - with debris removed and the one column with major damage to the backside shored and braced. Most of the remaining columns from floor 2 to the ground are oversized with transfer beams.

 

[SFCharlie]

As a subscriber, I'm allowed to share 10 articles a month, here's #1
Condo Wreckage Hints at First Signs of Possible Construction Flaw
Go for it...

SF Charlie
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[hetgen]

Back when this building was built was "integrity reinforcement" (bottom rebar to resist punching shear) required in parking garage slabs?

Only #4@12" bottom steel each-way is provided except for the end span; for the end span addition #4@12" are added (see clip below).

That most of the deck slab failed successively in punching shear, with the slab remaining intact and still connected to the exterior column line. Then, through catenary action, the slab dead load pulled on that column line causing failure.

There are substantial shear walls holding the upper ground floor slab against the catenary action and all the tower columns are tied to the ground floor slab, but looking at the drawings in detail, I think the catenary action may have caused the failure of the exterior tower columns without engaging the shear walls.

See the second clip below, the slab step beam will be subjected to massive torsion when the podium slab fails and the torsion will be transferred as excessive flexure on the exterior columns.

 

[warrenslo]

Looks as though most of the perimeter anchors were supposed to be mounted on the cantilevered portion....per the structural drawing.

This is very very interesting, because they weren't supposed to be on the penthouse.

Penthouse anchors had just been installed, look at that fresh roofing paper.

Closest to the guest parking and damaged column, the 12th floor or penthouse roof is near the bottom of the pile, not top.

 

[SFCharlie]

Fire Official: Demolition to Collapsed Condo to Start Sunday

So they waited until it was too late to get a court injunction, and moved it up to tomorrow.
I hope some people will have the courage to get the pets out, let alone their passports wallets purses...

Who could blame them if they occupied the building site.

SF Charlie
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[Roga50]

Governments NEVER move this quickly on any decision unless it is to protect themselves from prison time...

 

[bones206]

This is very very interesting, because they weren't supposed to be on the penthouse.

Those anchor points labeled P15, P16 and P17 are all on the cantilevered portion of the penthouse roof.

 

[Mark R]

As suspected, the city is rushing like hell to have the demolition done. I hope those lawyers file an injunction. Corruption down here at it's best... Now trying to destroy the evidence, as some have stated above..

Governments NEVER move this quickly on any decision unless it is to protect themselves from prison time..

The biggest priority here is the safety of the USAR teams and others in the area despite what you and many others think. These people are working under extreme conditions trying to find the remains of victims for their families. They are risking their lives trying to do this. Having an unstable structure next to them has to be on their minds constantly. Dropping that remaining section of the building will do nothing to protect public officials or others who are responsible for this problem.

 

[Retiredat46]

CNN just showed some video of work going on in the parking garage. Two columns each had at least a dozen large shoring devices in place around them. Also shown were two workers with what looked like surveying equipment.

 

[Roga50]

The biggest priority here is the safety of the USAR teams and others in the area despite what you and many others think. These people are working under extreme conditions trying to find the remains of victims for their families. They are risking their lives trying to do this. Having an unstable structure next to them has to be on their minds constantly. Dropping that remaining section of the building will do nothing to protect public officials or others who are responsible for this problem.

Then all they need to do is declare the "rescue" over and turn to "recovery" which we all know is the truth. Then let the REAL work start, such as preserving evidence. There is no rush in that...

As some have stated here, that building probably can be shored-up. What we have here are politicians trying to shore-up their futures (we see this a lot in Florida, and Dade County leads the way with the most corruption in the state).

 

[Roga50]

For instance, have any CCTV videos been recovered from inside the building? The security office is in the uncollapsed section. Afterwards, they will state that they must've been damaged during the demolition--so sorry...

What about other records kept onsite in the offices in that building (again, mostly in the uncollapsed sections near the elevators).

Our officials here NEVER move this quickly... That in itself is highly suspicious.

 

[Blooongeey]

Has anyone here addressed how it could be that there are no car alarms sounding in the tiktok video of the supposed collapsed garage deck??

 

[aggualaqisaaq]

Do you have any actual evidence that this demolition is part of a “cover up”? If so, please do share. I’m all ears…

But keep in mind that things like suspicions, hunches, conceivability, feelings, “I’m just asking questions,” “…but shady things happen all the time in _____,” etc. do not count as evidence for anything—-aside from overactive imaginations.