Crazy happening in My area,.....

[Bondo]

 

[flashback]

Well, I think I see why they took the video down, top engineer came out and said it was unproven. ..ain't no one gonna use it hearing stuff like that!

 

[garbageguy]

Interesting, thanks for posting.
Many fingers will be pointing. As a civil PE that has been though failure analyses on the owner's rep side, I'm guessing there will never be agreement on what caused the event, but people will latch onto something, usually from their perspective, and there are many.
In this case, immediate public safety is involved - my guess is these composite beams will not be used for such a span length anytime soon,. Iff they are used at all. their transportation and installation will be highly scrutinized.

 

[Grub54891]

Interesting. I didn’t watch all the videos but, we on here know what happens when you bump the dock, sure a small ding in the gel coat, but a spider crack several inches long. Repairing something like that creates a rather large area. Using fiberglass/carbon fiber/or composite materials to me shouldn’t be used for this kind of construction. Any little ding or such can look good but the strength is compromised.

 

[Bondo]

 

[Bondo]

This is not about that bridge, but about the same river,....

 

[flashback]

Nice to see something good for a change. Nature finds a way.

 

[Bondo]

Ayuh,..... Maine DOT is going to rebuild the fallen bridge, with Steel beams,....
That's good news, in My book,.....

MaineDOT to use steel girders in Old Town bridge rebuild

The Maine Department of Transportation says it will use conventional steel girders to replace the Llewellyn Estes Bridge over the Stillwater River in Old Town.

www.wabi.tv

 

[Bondo]

Nice to see something good for a change. Nature finds a way.

Ayuh,.... That's a pretty good video, but they took alota "Artistic License" in much of it, rather than posting just the facts,....

 

[flashback]

Ayuh,..... Maine DOT is going to rebuild the fallen bridge, with Steel beams,....
That's good news, in My book,.....

MaineDOT to use steel girders in Old Town bridge rebuild

The Maine Department of Transportation says it will use conventional steel girders to replace the Llewellyn Estes Bridge over the Stillwater River in Old Town.

www.wabi.tv

At least that will get the bridge open quicker and more safe as well. not like an experiment.

 

[Captain Caveman]

At least that will get the bridge open quicker and more safe as well. not like an experiment.

At this point, Maine DOT has no other option. They are screwed from a public perception standpoint. If they used another composite girder and it collapsed causing injury or death, decision-makers would be going to jail. They have zero choice but to switch back to steel from a liability standpoint.

My background is in complex commercial construction on the owner's rep side. I've seen all kinds of product failures. Based upon my experiences, more often than not the design is not the problem. Engineers don't stake their careers on a good guess, in terms of the design. Something in the process of installation usually is the culprit. It's the general constructor (or subcontractors) using inferior components that are not up to specification, or not following the prescribed procedure to the letter. It takes really good management structure within the GC's ranks to ensure that every step is followed 100%.

This case might be one of those outliers though, where the design was the problem. We heard designers and engineers state publicly that they were pushing this technology to its max. That's never something that you want to put on record - true or not.

 

[Chris1956]

At this point, Maine DOT has no other option. They are screwed from a public perception standpoint. If they used another composite girder and it collapsed causing injury or death, decision-makers would be going to jail. They have zero choice but to switch back to steel from a liability standpoint.

My background is in complex commercial construction on the owner's rep side. I've seen all kinds of product failures. Based upon my experiences, more often than not the design is not the problem. Engineers don't stake their careers on a good guess, in terms of the design. Something in the process of installation usually is the culprit. It's the general constructor (or subcontractors) using inferior components that are not up to specification, or not following the prescribed procedure to the letter. It takes really good management structure within the GC's ranks to ensure that every step is followed 100%.

This case might be one of those outliers though, where the design was the problem. We heard designers and engineers state publicly that they were pushing this technology to its max. That's never something that you want to put on record - true or not.

Do you remember when the installers used quick set epoxy to install masonry sheets in the ceiling of the "Big Dig" tunnel in Boston. The sheets with the slow set epoxy stayed in place, but the ones installed with the quick set epoxy fell onto moving cars one day causing lots of injuries. Of course, installing masonry into the ceiling with straight bolts, epoxy or not, is risky IMO.

 

[Bondo]