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Posted on 03/16/2018 12:25:26 PM PDT by C19fan
Engineering experts say investigators looking into the collapsed ‘instant’ bridge in Miami will want to know why a central tower which is usually built to support a suspension bridge was not in place when it collapsed onto Tamiami Trail on Thursday afternoon.
Last week, Florida International University’s official Twitter account posted a rendering of the bridge in its completed form as envisioned by the planners before its opening to foot traffic in early 2019.
The rendering shows a tall central column with cables connecting it to the main span.
Engineers say the design is known as a ‘cable-stayed bridge,’ which is a kind of suspension bridge, according to USA Today.
(Excerpt) Read more at dailymail.co.uk ...
We had a similar problem with the same design bridge here in Minneapolis.
http://www.startribune.com/failure-of-good-cables-stuns-sabo-bridge-s-inspector/139845473/
I bet they are asking themselves that now
This will go down with the greats
Such as Galloping Gurdy
the design engineer or architect do not give the constructor instructions on how to build the project
thats a big surprise to me, i think if my work was being put up i would want it done right and kind of at least hang around the project; my architect buddy said he goes to sites at least twice, when the foundation goes in and the roof goes on.
Accelerated? I'm betting they meant "Progressive".
As a PE, we like to call those pictures architectural misconceptions...
“Galloping Gurdy” was a classic case of trying to build a bridge without proper interpretation of wind tunnel data from the model design. It appears that this bridge that collapsed was built improperly in the first place.
If that were only so. There is a mental illness infecting the entire world right now.
The towers went up first, then roadway and cables were built out on both sides of the tower, balanced, until it reached the approach on one end and midpoint between towers on the other end. The second tower was worked the same way. Last piece was the short section at the midpoint, connecting the towers.
I guess that's the old, non-accelerated method?
[There is a mental illness infecting the entire world right now]
Yes, I include the world in that.
It certainly is ALL over the map.
If you look at the way the cable connections are angled, the post on the left IS the center post according to the rendering. It looks to me like the other part of the bridge as well as the support tower and cables were not in place.
Its called Daniel's 70th Sabbath!
.
Anyone who says the designers didn’t account for the loading of the structure at the current state of construction is as ignorant as a boiled egg. For a university professor to make such irresponsible statements is reprehensible. Something happened. Maybe something even criminal. Maybe just an accident. But until we know more, it is irresponsible to assign blame.
I believe that it way past time to ban bridges. for centuries bridges have been used to kill people either through a place to jump from or running into by transportation vehicles. They are and have been a place for violence and should be banned. We have no constitutional rights to bridges and we do not have an organization called the National Bridge Association to protect the rights of bridge ownership, therefore we should not meet much opposition.
If we cannot outright ban bridges this early in the game then we should at least restrict them to no closer than 250 feet from schools. We can protect our children.
I am also calling for a national protest for a walk out (from where I do not yet know)and a moment of silence for the number of minutes corresponding to the number of people killed.
in no way is this sarcasm meant to diminish the horrible fact that so many promising lives have been lost in this tragedy. My personal prayers go out to all of the family and friends for people killed or injured in this event.
I can’t imagine any jurisdiction would allow the construction of a bridge over a public roadway without a licensed engineer signing off on the design.
Really? For a concrete pedestrian bridge? 950 tons? How many people does it take to weigh 950 tons? I think you must have it backwards.
I’m thinking we may find some affirmative action hires in the decision making chain. Bet you a bowl of pho.
Well, duh! Every story is written saying “the cables were loose and were supposed to be tightened “. Yet, every picture shows no tower or cables.
“So a bridge is being constructed where the main support structure has not yet been built???”
That would be OK, the bridge was *placed under load* where the main support structure was not yet built/completed/connected. It was placed under load in a completely incomplete state.
It’s so sub-3rd grade stupid it’s actually hard to explain cogently. Astoundingly stupid.
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