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That bridge collapse in Miami-Dade

 
Chrissy 2018-03-15 15:53:04 

by FIU - several dead - mostly folks in cars because pedestrians couldn't use the bridge until next year.
This is horrific.

I know the area well. Florida needs a bush bath.

 
nick2020 2018-03-15 16:01:53 

In reply to Chrissy

A bush bath?

 
nickoutr 2018-03-15 16:40:25 

In reply to Chrissy

A bush bath?

that is up your alleyway

 
Chrissy 2018-03-15 17:12:42 

In reply to nick2020

Looks like the idiots were doing a stress test in rush hour - did not close that section of the street.

This will do way more damage to Scott et al. Several folks are dead.

 
sgtdjones 2018-03-15 17:55:41 

The bridge that just collapsed in Miami was designed to withstand a Category 5 hurricane

On paper, the 40-foot wide pedestrian bridge on Florida International University's campus was an engineering feat, boasting several superlatives.

Here are some, as outlined by the university:
It was designed to withstand a Category 5 hurricane.
Its durability was supposed to exceed 100 years.
It's the first bridge in the world to be constructed entirely of self-cleaning concrete: It's made of titanium dioxide which, when exposed to sunlight, captures pollutant particles from the air and cleans its own concrete surfaces.
It was installed in just a few hours just five days ago, although its construction wasn't finished.



Link Text

Trump will blame Mexicans for the Engineering and Construction.

shock

 
camos 2018-03-15 18:18:32 

that is a factory made structure,that was hauled in place and assembled on site; bet my last dollar they failed to bolt some sections together.

 
Chrissy 2018-03-15 18:42:05 

In reply to camos

Who knows but the bridge failed the stress test

 
Dan_De_Lyan 2018-03-15 19:16:42 

In reply to nickoutr

Stress test on site? does she know anything about how engineering codes are generated?

Should stick to her expertise, Pitch Rolling and general busseying big grin

 
Chrissy 2018-03-15 19:31:05 

In reply to camos
From Local 10

MIAMI-DADE COUNTY, Fla. - A newly-installed portion of a pedestrian bridge connecting Florida International University with the city of Sweetwater collapsed Thursday.

According to the Florida Highway Patrol, there are "several fatalities."

"There are no words to articulate. This is completely unfathomable, and I'm nauseated, and it's completely and utterly unacceptable," one FIU student said.

The 950-ton section of the $14.2 million bridge at Southwest Eighth Street and Southwest 109th Avenue was installed Saturday.

Workers at the scene told Local 10 News reporter Carlos Suarez that the bridge was undergoing some sort of stress test when it collapsed.

Suarez reached out to the construction company for comment, but hasn't heard back, however a vehicle labeled "Structural Technologies VSL" was among those crushed by the bridge. The company manufactures post-tensioning systems for bridges.

 
johndom90 2018-03-15 20:11:23 

I hope Russia eh involved....


nb...if you follow the daily news, Russia all about.

 
Chrissy 2018-03-16 06:18:51 

Excellent article

In the hours after a 950-ton pedestrian bridge over Tamiami Trail collapsed Thursday afternoon, killing at least four people, civil engineers began to speculate about potential causes.

Was it a design error? Did something go wrong during construction?

The answer may be buried deep in the calculations made by workers who were conducting a stress test on the unfinished and vulnerable bridge. Any such test, experts told the Miami Herald, requires extreme care and precision to avoid overwhelming the structure. Too much weight on the bridge or over-tightened cables could cause problems.

The firms behind the project are Miami-based MCM and Figg Bridge Group, a well-known Tallahassee design company. Miami-Dade Mayor Carlos Gimenez said that crews were conducting a stress test on the bridge Thursday, and Miami-Dade Fire Rescue confirmed two workers were on the bridge when it collapsed.

 
Larr Pullo 2018-03-16 06:26:24 

In reply to camos

bet my last dollar they failed to bolt some sections together.


Did they procure it from Ikea?

Too soon?

 
Chrissy 2018-03-16 07:41:58 

In reply to Larr Pullo

Check this

Marco Rubio
✔
@marcorubio

The cables that suspend the #Miami bridge had loosened & the engineering firm ordered that they be tightened. They were being tightened when it collapsed today.https://twitter.com/officialjoelf/

 
StumpCam 2018-03-16 07:54:23 

In reply to Chrissy

My educated guess is that it's a design flaw. I believe the bridge was too heavy and collapsed under its own weight! Many of these type bridges have been installed over New York City highways but are skeleton designs...mostly steel with little concrete.

 
NineMiles 2018-03-16 08:00:25 

In reply to Chrissy

Isn't this the kinda stuff that happens in shithole countries??

 
hubert 2018-03-16 08:07:31 

In reply to NineMiles

lol lol lol

 
Chrissy 2018-03-16 08:09:30 

In reply to NineMiles

Ding ding we have a winner lol

 
birdseye 2018-03-16 08:37:16 

In reply to Dan_De_Lyan

Stress test on site? does she know anything about how engineering codes are generated?
So the bridges that are built on site – which are most of them – where are their stress tests done? ----- normally the engineering and design are done in the office ---- I also don’t think forgetting to tighten a bolt caused the failure ---

Engineers and designers depends on material manufacturers for assurances that their products meet certain standards --- impurities in a steel beam/column can be problematic ----- and with foreign steel imports and builders going for cheap stuff to cut cost --- who knows

 
JayMor 2018-03-16 08:49:45 

In reply to Dan_De_Lyan

In reply to nickoutr
Stress test on site? does she know anything about how engineering codes are generated? Should stick to her expertise, Pitch Rolling and general busseying

So, now that it was indeed a "Stress test on site" being done and you should instead stick to your expertise, shouldn't you man up...? (I suspect Chrissy isn't holding her breath though, perhaps because she knows you.)

--Æ.

 
Chrissy 2018-03-16 09:10:32 

In reply to JsyMor

Hi bro. Shhhhhhhhh! Leff dat 'eediot'. Ran like di rats in 'Rat Race'.

Wah Bob seh - in di abundance of water a fool is thirsty.
lol lol

 
Chrissy 2018-03-16 09:11:42 

In reply to birdseye

Ignore bro. Di higher monkey climb, di more he expose 'heself'. lol

 
JayMor 2018-03-16 09:31:44 

In reply to Chrissy and Birdseye

Some real bwoy pon dis board, eh! Some of dem can't even zip up dem pants front so dem likkle pee-pee showing every time.

--Æ.

 
Chrissy 2018-03-16 09:58:10 

In reply to JayMor

Yep - on the other hand there are many real men here as well lol

 
birdseye 2018-03-16 10:28:46 

In reply to JayMor

I just saw something on TV that workers were adjusting the suspension cables on the Bridge when it crashed ---- the question is – why didn’t they close the road below while they were doing that adjustment ---- or better yet – why wasn’t everything satisfactorily completed before the road below was opened……talk about negligence – if that’s what happened

 
Chrissy 2018-03-16 10:37:33 

In reply to birdseye

Someone will end up in prison over the failure to close that section of the street.

 
JayMor 2018-03-16 11:38:22 

In reply to birdseye

I saw a similar report, misself. I'm noticing something a bit different from 'our' time... a trend toward a complete trust in technology and the seeming lowered reliance on backup, caution, common sense, etc. How did we ever get to "real-time testing" of something like a bridge? Hard to believe that there aren't laws against such wild practices.

--Æ.

 
Chrissy 2018-03-16 12:08:04 

In reply to JayMor

It's crazy for real.
The idea is that you can move a bridge of this weight into position with no inconvenience is absurd.
These days I think the management gurus and project managers overrule the engineers, mathematicians and physicists.

As usual fools rush in and others die. The word accident is often misused - this was abject negligence.

 
nitro 2018-03-16 12:59:33 

Madness.

 
POINT 2018-03-16 13:31:18 

"Good Things No Cheap & Cheap things
No Good" . There is going to be hopefully a thorough Enquiry regarding
this matter , and a lot of Lawsuits
flying around .

 
camos 2018-03-16 13:34:34 

Banana republics start as high as Virginia.
lol

 
Chrissy 2018-03-16 14:34:51 

In reply to camos

I have always had a problem with this Banana republic title. Every one of them was a US puppet or better still a puppet for the US banana companies.

 
birdseye 2018-03-16 15:42:23 

In reply to JayMor

There are regulations and codes everywhere – unfortunately the penalties are so meagre – they do not provide a deterrent – its more beneficial to take the risk of cutting corners ------in the event something goes wrong – you pay the fine and still come out ahead --- its like the old days of the pinto cars – it was cheaper to pay death benefits caused by the car defects than make the cars safe --- Ralph Nader – for all his quirks did do some real good to change that and make cars safer

 
Chrissy 2018-03-16 21:51:36 

In reply to birdseye

Bridge designer left state voice mail about cracks days before FIU bridge collapsed

Two days before a pedestrian bridge collapsed at Florida International University, killing at least six people, an engineer with the firm that designed the structure called the state and left a voicemail to report cracking in the concrete span.

It went unheard for three days.

It was uncertain if those cracks, observed at the north end of the 950-ton structure, contributed to the catastrophic collapse on Thursday. The National Transportation Safety Board, when questioned about the cracking on Friday night during a briefing on the campus, stressed caution and said they were looking into a range of possible causes.

“A crack in the bridge does not necessarily mean it’s unsafe,” lead NTSB investigator Robert Accetta said.

 
Norm 2018-03-17 04:23:44 

In reply to Chrissy

Several things could have gone wrong, including both unanticipated and anticipated. It is the latter that will cause heads to roll.

The unanticipated: new construction material (titanium dioxide). There isn't much experience out there about its performance in a full size structure, during transportation, installation and post-installation. Hence, the stress testing was quite in order. Stress testing is required ever for bridges made of traditional materials, using traditional construction methods.

The anticipated: bridges could fail (and have failed), catastrophically, during stress testing. The risk of failure is much higher with a "first of its kind" structure. Live traffic should not have been allowed under the bridge during the stress testing.

Apparently, some of the post-tensioning cables through the bridge deck started losing tension during the stress testing. At that point it should have been obvious that catastrophic failure was imminent, because this tension carries the loads above the weight of the structure itself.

The fact that the workers were told to re-tension the cables shows that there was still a bit of time to stop traffic below. The whole point of the stress testing is to uncover defects in design or construction. Until it is successfully completed, it should have been assumed that the bridge could have failed catastrophically under load, including during the stress test.

Even if the design or materials were defective, the contractor could have avoided this catastrophe, and will take most of the blame here for the loss of life and property damage, if not all.

Other issues: a 40-foot-wide pedestrian bridge seems quite unnecessary. They are usually about 8 to 12 feet wide - to facilitate construction (!) and keep down costs The $11M price tag seems exorbitant, even for a 40-foot-wide structure. (Note the weight: 940 or so tons. This translates to about 400+ cubic yards of normal concrete, which costs about $500 to $1000 a cubic yard installed.)

The choice of size, novel materials, etc, for a bridge to be placed over live traffic was not a smart one. This was further compounded by the poor construction decision to stress test over live traffic.

 
Chrissy 2018-03-17 06:38:41 

In reply to Norm

Yep - good post bro

 
Chrissy 2018-03-17 16:47:47 

Watch dis allyuh!