03-15-2018, 03:47 PM
|
#1
|
Franchise Player
|
Bridge collapse in Florida
https://www.google.ca/amp/s/amp.theg...ollapse-latest
Didn't see a thread about this but a bridge on the FIU campus collapsed days after it was put in place. From what I understand, this portion was designed to be completed in a few hours. I've read some comments that spoke of the walkway being essentially unsupported, but that doesn't mean anything.
Awful, awful tragedy.
__________________
Mom and Dad love you, Rowan - February 15, 2024
|
|
|
03-15-2018, 04:09 PM
|
#2
|
Powerplay Quarterback
|
That is brutal.
__________________
Sent from an adult man under a dumpster
|
|
|
03-15-2018, 04:16 PM
|
#3
|
Franchise Player
|
It's spring break down there or it would have been way worse!
|
|
|
03-15-2018, 06:45 PM
|
#4
|
Franchise Player
Join Date: Jul 2008
Location: in a swamp, tied to a cypress tree
|
Two companies involved in building the bridge had several previous violations elsewhere
Previous violations for companies behind bridgehttps://www.wptv.com/news/region-c-palm-beach-county/west-palm-beach/companies-behind-fiu-bridge-have-record-of-previous-violations
Sent from my Princess phone
|
|
|
03-15-2018, 06:52 PM
|
#5
|
Franchise Player
Join Date: Jul 2008
Location: in a swamp, tied to a cypress tree
|
Bridge collapse in Florida
Quote:
Originally Posted by missdpuck
Two companies involved in building the bridge had several previous violations elsewhere
Previous violations for companies behind bridgehttps://www.wptv.com/news/region-c-palm-beach-county/west-palm-beach/companies-behind-fiu-bridge-have-record-of-previous-violations
Now 4 confirmed dead.
http://wpbf.com/article/pedestrian-b...446651?src=app
RIP.
Sent from my Princess phone
|
Sent from my Princess phone
|
|
|
03-15-2018, 07:16 PM
|
#6
|
Franchise Player
|
Horrible story.
6 hours to install a bridge of 175 feet, seems very fast. The lawsuits will be flying over this one.....
__________________
If I do not come back avenge my death
|
|
|
The Following User Says Thank You to Northendzone For This Useful Post:
|
|
03-15-2018, 07:20 PM
|
#7
|
Crash and Bang Winger
|
Quote:
Originally Posted by Northendzone
Horrible story.
6 hours to install a bridge of 175 feet, seems very fast. The lawsuits will be flying over this one.....
|
On the flip side, it feels like they've been building that new bridge over Deerfoot by 17 ave for about a year now
|
|
|
03-15-2018, 10:14 PM
|
#8
|
Franchise Player
|
Quote:
Originally Posted by Ahuch
On the flip side, it feels like they've been building that new bridge over Deerfoot by 17 ave for about a year now
|
See, that sounds like it makes sense. It's a bridge.
__________________
Mom and Dad love you, Rowan - February 15, 2024
|
|
|
03-15-2018, 11:45 PM
|
#9
|
Voted for Kodos
|
Quote:
Originally Posted by Northendzone
Horrible story.
6 hours to install a bridge of 175 feet, seems very fast. The lawsuits will be flying over this one.....
|
They talk about this bridge being a “fast build”, but from what I can tell, it’s not too far out from what often happens with bridges. Yes they moved that huge structure all into place at once, but there was a lot more work to do on the bridge yet.
That being said, this bridge was supposed to look like a cable stayed bridge in the end, which, from how this was constructed, was essentially cosmetic. I don’t understand why someone would want to design a bridge that way.
The whole building method was supposed to eliminate disruption, but I don’t understand why a little bit more standard girder erection is too disruptive. Anyone around here been disrupted by the new bridge construction over Deerfoot? A couple of overnight road closures isn’t the end of the world. They had a road closure here too.
I’ve seen some photos that make this definately look like a structural failure in the main truss that was just put into place.
|
|
|
03-16-2018, 12:04 AM
|
#10
|
Voted for Kodos
|
Here’s a rendering of the finished bridge:
It looks like it’s supposed to be supported by the cables, but the cables weren’t in place yet, such a confusing nstallation method - seems overly complicated to me.
The various stresses on that main truss are much different on supporting itself temporarily, vs being supported on the cables. I suspect that the problem is that this span wasn’t strong enough to support itself without the cables.
|
|
|
03-16-2018, 12:06 AM
|
#11
|
Voted for Kodos
|
Also, what a terrible looking bridge design, IMO.
|
|
|
03-16-2018, 12:13 AM
|
#12
|
Franchise Player
Join Date: Jan 2010
Location: east van
|
Quote:
Originally Posted by missdpuck
Two companies involved in building the bridge had several previous violations elsewhere
Previous violations for companies behind bridgehttps://www.wptv.com/news/region-c-palm-beach-county/west-palm-beach/companies-behind-fiu-bridge-have-record-of-previous-violations
Sent from my Princess phone
|
The free market solves everything once again.
|
|
|
The Following 2 Users Say Thank You to afc wimbledon For This Useful Post:
|
|
03-16-2018, 12:24 AM
|
#13
|
Voted for Kodos
|
In summary, if that truss can support itself without the cables, why put the cables on?
If the bridge can’t support itself without the cables, why was it put in place without them?
It really looks to me like it was designed to be held up by the cables, not to support itself. If the trusses were supposed to go in before the cables, the truss should have been on shoring until the time when the cables were all in, with the truss on the other side in place as well. As a cable stayed bridge, you can’t build just one side of the cables first, you have to go back and forth from side to side, as the weight from one side braces the other side.
This bridge seems to be like a very flawed design if the intention is to minimize disruption. If the bridge is actually supported by the cables, there is no way to build it without major disruption to the road below.
|
|
|
03-16-2018, 02:15 AM
|
#14
|
Franchise Player
|
Senator Rubio stated the cables were being tightened at the time of the collapse. how this road wasn't closed until the bridge was completed and safety checked is beyond comprehension.
Edit:
update. at least 6 dead now
Last edited by Snuffleupagus; 03-16-2018 at 03:10 AM.
|
|
|
The Following User Says Thank You to Snuffleupagus For This Useful Post:
|
|
03-16-2018, 07:36 AM
|
#15
|
Franchise Player
Join Date: Feb 2011
Location: Somewhere down the crazy river.
|
I actually though the engineering standards were supposed to much higher in the US. At least obtaining your PEng / PE was supposed to be more onerous.
Anecdotally though I was kind of surprised what is allowed in the US for example with the electrical code vs here in Canada. My re-wiring job would have been made a lot easier if I could have used some of the devices that the US apparently allows.
|
|
|
03-16-2018, 07:44 AM
|
#16
|
Voted for Kodos
|
Quote:
Originally Posted by Snuffleupagus
Senator Rubio stated the cables were being tightened at the time of the collapse. how this road wasn't closed until the bridge was completed and safety checked is beyond comprehension.
Edit:
update. at least 6 dead now
|
Perhaps something to do with post tensioning cables within the deck itself. On the pictures of the rubble, there’s no sign of any cable stays, or any tower that holds them up. They were not in place yet.
Here’s a quick and ugly markup of what existed when it collapsed:
Last edited by You Need a Thneed; 03-16-2018 at 07:49 AM.
|
|
|
03-16-2018, 08:58 AM
|
#17
|
Franchise Player
Join Date: Mar 2007
Location: Income Tax Central
|
Beware the Ides of March?
__________________
The Beatings Shall Continue Until Morale Improves!
This Post Has Been Distilled for the Eradication of Seemingly Incurable Sadness.
If you are flammable and have legs, you are never blocking a Fire Exit. - Mitch Hedberg
|
|
|
03-16-2018, 09:17 AM
|
#18
|
Norm!
|
I heard on the news that this isn't the first time the company had a bad build.
__________________
My name is Ozymandias, King of Kings;
Look on my Works, ye Mighty, and despair!
|
|
|
03-16-2018, 09:34 AM
|
#19
|
Unfrozen Caveman Lawyer
Join Date: Oct 2002
Location: Winebar Kensington
|
My hockey buddies last night were talking about the Iron Ring that Canadian engineers wear (my Dad was proud of his):
https://en.wikipedia.org/wiki/Iron_Ring
The ring symbolizes the pride which engineers have in their profession, while simultaneously reminding them of their humility. The ring serves as a reminder to the engineer and others of the engineer's obligation to live by a high standard of professional conduct.
Many incorrectly believe that the rings are made from the steel of a beam from the first Quebec Bridge, which collapsed during construction in 1907.
|
|
|
03-16-2018, 10:14 AM
|
#20
|
Powerplay Quarterback
|
Quote:
Originally Posted by Snuffleupagus
Senator Rubio stated the cables were being tightened at the time of the collapse. how this road wasn't closed until the bridge was completed and safety checked is beyond comprehension.
Edit:
update. at least 6 dead now
|
If a post-tension cable snapped while they were re-tensioning it, that could explain a mid-span collapse. There was mention of tension jacks being visible in some of the pictures and Rubio's tweet about the cables slackening also supports it.
As for leaving the road open with an unfinished bridge in place. It's not abnormal, that's exactly what is going on with the BRT bridge over Deerfoot. The girders are placed on their bearing plates and braced off to the pier and the permanent braces placed between the girders. Deck is poured (partial or full road closure) and then the whole thing will be post-tensioned with Deerfoot open. In the Florida case, with aesthetic cable stays only, the whole span would have been designed to be supported by the piers and would have been fine to leave installed with bracing.
|
|
|
Thread Tools |
Search this Thread |
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 12:26 AM.
|
|