New pedestrian bridge collapses in Miami...

richc

NES Member
Rating - 100%
35   0   0
Joined
Oct 21, 2008
Messages
14,621
Likes
12,458
Location
metrowest
Multiple fatalities reported among numerous crushed cars. Bridge was moved into place on Saturday having used an accelerated construction technique.

"A press release from Florida International University highlighted the fact that this bridge was built with Accelerated Bridge Construction (ABC) methods, which "reduces potential risks to workers, commuters and pedestrians and minimizes traffic interruptions."

The Federal Highway Administration states that such methods help "reduce the onsite construction time" it takes to build or repair a bridge, which is meant to improve "work-zone safety for the traveling public" while reducting traffic impacts and weather-related construction delays."

Miami pedestrian bridge collapses: Live updates - CNN

 

Spanz

NES Member
Rating - 100%
1   0   0
Joined
Feb 25, 2009
Messages
29,000
Likes
13,906
"Accelerated Bridge Construction" just sounds like a bad idea.
they were tensioning some cables on one side of the bridge while allowing traffic to move underneath it. And the tensioning procedure failed, with a piece breaking away from a crane.

Why they did not stop the traffic....arrogance? Hubris? Stupidity?

a lot of these modern bridges are not held up by the concrete, but instead by 10 or so heavy cables going THRU the concrete slab, with enormous tension applied to the cable. Concrete in compression is massively strong. But concrete without the tension cables = weak
 
Last edited:
Rating - 100%
2   0   0
Joined
Jan 19, 2018
Messages
1,438
Likes
1,013
Location
South Shore
Don't need building regulations, the invisible hand of the free market will sort it out. People who don't want to get crushed to death commuting to work should vote with their wallets and move away. /s
 

TLB

Rating - 100%
1   0   0
Joined
Mar 26, 2010
Messages
4,021
Likes
1,621
Location
Heading for greener pastures
they were tensioning some cables on one side of the bridge while allowing traffic to move underneath it. And the tensioning procedure failed, with a piece breaking away from a crane.

Why they did not stop the traffic....arrogance? Hubris? Stupidity?

a lot of these modern bridges are not held up by the concrete, but instead by 10 or so heavy cables going THRU the concrete slab, with enormous tension applied to the cable. Concrete in tension is massively strong. But concrete without the tension = weak
This is unreal....
 

new guy

NES Member
Rating - 100%
57   0   0
Joined
Dec 7, 2009
Messages
20,970
Likes
14,569
It's insane that they were doing the tensioning with traffic under the "bridge." How many of the drivers realized what was going on overhead? How many of the actual workers/hard hats do you think were underneath the slab at the time? I'm guessing not many.
 
Rating - 100%
8   0   0
Joined
May 5, 2009
Messages
10,180
Likes
5,708
Days before the principles NOW!! Deleted tweet stated student safety is our priotity...see kiddies life happens Guns, Cars, Knives, Bridges YOU NAME IT!!! life happens...wake up!!!
 

silversquirrel

NES Member
Rating - 100%
5   0   0
Joined
Jan 6, 2013
Messages
1,667
Likes
1,033
Location
Gloucester
The other half over the river isnt there yet. Cable stays and mast not up yet. Looks like both spans bear on that pier between the highway and the river. The span somehow slipped or sheared off of that pier, which is still standing...

 

silversquirrel

NES Member
Rating - 100%
5   0   0
Joined
Jan 6, 2013
Messages
1,667
Likes
1,033
Location
Gloucester
Looks like the end of the span either slipped off of the pier, or sheared off. Too much dead weight at that end, that was to later be carried by the cables and mast. Bad connection design, or wrong load used to calculate. Just a guess.
 

calsdad

NES Member
Rating - 100%
28   0   0
Joined
Apr 24, 2006
Messages
37,470
Likes
12,118
Location
Chelmsford MA
Don't need building regulations, the invisible hand of the free market will sort it out. People who don't want to get crushed to death commuting to work should vote with their wallets and move away. /s
LOL.

I'm pretty sure a bridge going over a major public thoroughfare like that has building codes and regulations up the ass applied to it.

And yet it still failed.

So what's your point?

You sound like one of those gun grabbers who keeps crying for more background checks - after the government just let a psycho get a gun anyway even though we already had background checks.
 
Top Bottom