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Foot bridge collapses at Florida university, several killed
Posted by: DP
Date: March 15, 2018 01:56PM
Reuters) - A pedestrian bridge spanning several lanes of traffic collapsed on Thursday at Florida International University in Miami-Dade County, trapping people and cars underneath the structure, with local media saying several people were killed.

[www.yahoo.com]

[www.bbc.com]




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Edited 1 time(s). Last edit at 03/15/2018 02:00PM by DP.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: mrbigstuff
Date: March 15, 2018 02:04PM
"Opened days ago..." wtf?


Hurts like a bastid...
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Re: Foot bridge collapses at Florida university, several killed
Posted by: steve...
Date: March 15, 2018 02:10PM
I think it was just installed on Saturday and they were still working on it. One worker was on the bridge and a witness in her car said 7-8 cars were crushed when it fell.




Northern California Coast
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Re: Foot bridge collapses at Florida university, several killed
Posted by: lost in space
Date: March 15, 2018 02:11PM
It was under construciton as of August 2017

goomaps


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Re: Foot bridge collapses at Florida university, several killed
Posted by: 3d
Date: March 15, 2018 02:32PM
Dang.

FIU touted the bridge to be a first of its kind, tweeting that it swung into place on Saturday. According to an FIU press release, the 174-foot, 950-ton bridge was just installed "in a few hours" using "accelerated bridge construction" methods, which the university said "reduces potential risks to workers, commuters, and pedestrians and minimizes traffic interruptions."

The move was the largest pedestrian bridge move via Self-Propelled Modular Transportation, in U.S. history.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: mrbigstuff
Date: March 15, 2018 02:35PM
Quote
lost in space
It was under construciton as of August 2017

goomaps

Holy sh@t, right at a traffic signal, too


Hurts like a bastid...
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Re: Foot bridge collapses at Florida university, several killed
Posted by: pdq
Date: March 15, 2018 03:08PM
Quote

Touted as an “instant bridge,” the 950-ton pedestrian walkway was installed in a single morning...

More like "instant karma" for engineering hubris. Early reports say one of the two pillars supporting the bridge "collapsed to the side".

What a tragedy.

Edit: Yikes! Just five days ago they were crowing about this:

Quote

The innovative installation method significantly reduced risks to workers, pedestrians and motorists and minimized traffic disruptions, FIU said.



Edited 1 time(s). Last edit at 03/15/2018 04:09PM by pdq.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: Acer
Date: March 15, 2018 03:16PM
I'm reminded of that The Hyatt Regency Skywalk Collapse in 1981. The contractor requested a change that seemed innocuous, the engineer said "whatevs" without running the numbers, and 114 people died in a blink. My office pool bet says something similar happened here. We'll see.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: mikebw
Date: March 15, 2018 03:36PM
Quote
Acer
I'm reminded of that The Hyatt Regency Skywalk Collapse in 1981. The contractor requested a change that seemed innocuous, the engineer said "whatevs" without running the numbers, and 114 people died in a blink. My office pool bet says something similar happened here. We'll see.

I read about that in an engineering book years ago. Tragic.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: davemchine
Date: March 15, 2018 04:04PM
That is just awful. A lot of finger pointing but it sounds like they don't really know what happened yet.


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Re: Foot bridge collapses at Florida university, several killed
Posted by: Kraniac
Date: March 15, 2018 04:18PM
this is seriously crazy and sad..and makes you look back at 'His' moment where he stood in front of a group of reporters and showed them how he was gonna reduce the pile of codes and formalities to 2/3 of the stack of paper.. to make it 'easier' to execute infrastructure projects. There is a reason for all of this rigorous inspection and triple checking..this is it.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: billb
Date: March 15, 2018 04:41PM
Jeebus, they don't even know why it collapsed yet.


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Re: Foot bridge collapses at Florida university, several killed
Posted by: mikebw
Date: March 15, 2018 05:01PM
Quote
billb
Jeebus, they don't even know why it collapsed yet.

Gravity.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: Kraniac
Date: March 15, 2018 05:28PM
I'm quite sure that none of this had anything to DO with any deregulation..the point is that this stuff does demand a high level of scrutiny..it's just an illuminating moment.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: ztirffritz
Date: March 15, 2018 05:35PM
99Percent Invisible had a good episode about the near collapse of the Citicorp building because of a design change made by the contractor that was really interesting.

[99percentinvisible.org]

The convention center in Pittsburgh has some massive trusses anchoring parts of the structure. They had a similar failure because a contractor swapped some less expensive nuts/bolts in place of what the architect spec'd.

[failures.wikispaces.com]


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Re: Foot bridge collapses at Florida university, several killed
Posted by: RE:up
Date: March 15, 2018 06:02PM
I'm sure that the NRA had something to do with this.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: M A V I C
Date: March 15, 2018 06:26PM
Quote
RE:up
I'm sure that the NRA had something to do with this.

And because of that, some are calling for tighter bridge control. Bridges doesn't kill people, people wrongly using bridges do. There's no mental health check on those building bridges. If just one life could be saved by not building bridges, we should get rid of them all.



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Re: Foot bridge collapses at Florida university, several killed
Posted by: lost in space
Date: March 15, 2018 07:58PM
Quote
mikebw
Quote
Acer
I'm reminded of that The Hyatt Regency Skywalk Collapse in 1981. The contractor requested a change that seemed innocuous, the engineer said "whatevs" without running the numbers, and 114 people died in a blink. My office pool bet says something similar happened here. We'll see.

I read about that in an engineering book years ago. Tragic.

Was that the one where the change put a concentrated load on an upright, which then took all the weight instead of it being distributed across several uprights? Or something like that?

Also, I'm astounded to think that the bridge essentially couldn't support its own weight, considering how little pedestrians using it could have weighed in comparison to the structure itself.






Edited 1 time(s). Last edit at 03/15/2018 08:18PM by lost in space.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: ka jowct
Date: March 15, 2018 09:25PM
That Citicorp piece is really scary. I’ve been through that subway stop many times, and am very familiar with the area, since I worked not far from there years ago and have clients nearby now. A building collapse there would have been really dreadful.

It’ll be interesting to hear what went wrong with the bridge. Horrible situation, although at least it wasn’t open to pedestrians yet. Driving along minding your own business and a bridge falls on you. What a nightmare.



Edited 1 time(s). Last edit at 03/15/2018 09:28PM by ka jowct.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: deckeda
Date: March 15, 2018 09:42PM
That Citi building is a classic study in all the Project Management books. It’s what could happen when you don’t take all reasonable engineering circumstances into account ... but the true lesson there is in risk management. The design was “OK” until you factored the risk into it. And so they rejiggered it. ‘Cause wind.

It’ll be interesting to learn where the decision making failed here. Tacoma Narrows, Denver Airport ... they all had glaring Achilles Heels.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: ka jowct
Date: March 15, 2018 10:46PM
I hope that the Hudson Yards development on the west side of Manhattan is being built with a healthy respect for wind. Wind along 11th Ave. is for some reason noticeably worse than it is along the East side near the East River.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: N-OS X-tasy!
Date: March 15, 2018 10:51PM
Quote
Acer
I'm reminded of that The Hyatt Regency Skywalk Collapse in 1981. The contractor requested a change that seemed innocuous, the engineer said "whatevs" without running the numbers, and 114 people died in a blink.

It was a bit more complex than that.


It is what it is.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: N-OS X-tasy!
Date: March 15, 2018 10:53PM
Quote
davemchine
That is just awful. A lot of finger pointing but it sounds like they don't really know what happened yet.

Exactly. Give the engineers time to conduct a proper failure analysis.


It is what it is.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: N-OS X-tasy!
Date: March 15, 2018 10:54PM
Quote
Kraniac
this is seriously crazy and sad..and makes you look back at 'His' moment where he stood in front of a group of reporters and showed them how he was gonna reduce the pile of codes and formalities to 2/3 of the stack of paper.. to make it 'easier' to execute infrastructure projects. There is a reason for all of this rigorous inspection and triple checking..this is it.

No politics, please.


It is what it is.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: billb
Date: March 15, 2018 11:14PM
Quote
mikebw
Quote
billb
Jeebus, they don't even know why it collapsed yet.

Gravity.
LOL
We must resist gravity.


The Phorum Wall keeps us safe from illegal characters and words
The doorstep to the temple of wisdom is the knowledge of one's own ignorance. -Benjamin Franklin
BOYCOTT YOPLAIT [www.noyoplait.com]
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Re: Foot bridge collapses at Florida university, several killed
Posted by: Acer
Date: March 15, 2018 11:39PM
Quote
N-OS X-tasy!
Quote
Acer
I'm reminded of that The Hyatt Regency Skywalk Collapse in 1981. The contractor requested a change that seemed innocuous, the engineer said "whatevs" without running the numbers, and 114 people died in a blink.

It was a bit more complex than that.

Yes, there is a lot more that could be said than my abrupt summary. Here's an official report: Investigation of the Kansas City Hyatt Regency Walkways Collapse. (NBS BSS 143)
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Re: Foot bridge collapses at Florida university, several killed
Posted by: mikebw
Date: March 16, 2018 08:51AM
Quote
lost in space
Quote
mikebw
Quote
Acer
I'm reminded of that The Hyatt Regency Skywalk Collapse in 1981. The contractor requested a change that seemed innocuous, the engineer said "whatevs" without running the numbers, and 114 people died in a blink. My office pool bet says something similar happened here. We'll see.

I read about that in an engineering book years ago. Tragic.

Was that the one where the change put a concentrated load on an upright, which then took all the weight instead of it being distributed across several uprights? Or something like that?

Also, I'm astounded to think that the bridge essentially couldn't support its own weight, considering how little pedestrians using it could have weighed in comparison to the structure itself.

Better explanations out there, but basically the load from two walkways was supposed to be carried through the same continuous piece of metal secured to the ceiling, but they built it such that the lower walkway was instead secured to the frame of the upper walkway which was not designed to carry that weight.
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Re: Foot bridge collapses at Florida university, several killed
Posted by: N-OS X-tasy!
Date: March 16, 2018 10:34AM
Quote
mikebw
Quote
lost in space
Quote
mikebw
Quote
Acer
I'm reminded of that The Hyatt Regency Skywalk Collapse in 1981. The contractor requested a change that seemed innocuous, the engineer said "whatevs" without running the numbers, and 114 people died in a blink. My office pool bet says something similar happened here. We'll see.

I read about that in an engineering book years ago. Tragic.

Was that the one where the change put a concentrated load on an upright, which then took all the weight instead of it being distributed across several uprights? Or something like that?

Also, I'm astounded to think that the bridge essentially couldn't support its own weight, considering how little pedestrians using it could have weighed in comparison to the structure itself.

Better explanations out there, but basically the load from two walkways was supposed to be carried through the same continuous piece of metal secured to the ceiling, but they built it such that the lower walkway was instead secured to the frame of the upper walkway which was not designed to carry that weight.

That's the gist of it.


It is what it is.
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