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PostPosted: Sat May 25, 2013 2:08 pm 
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Corolinth wrote:
That's an interesting article, although they give the wrong impression of what happened to the Minnesota bridge in 2007. The gusset plate that cracked wasn't "too thin," it was just never designed for the loads it ended up carrying forty years later. The state of Minnesota overloaded that bridge.


In a general sense, I think this applies to most of the bridge infrastructure in the US (rail, vehicle, etc..).

Technology has made the things that cross these bridges bigger, faster, and heavier, and far more numerous, which coupled with a better understanding of engineering and design, and higher expectations for the government making us all feel safe, makes all of this stuff look like a pile of crap that we shouldn't be exposing our children too. When they were made, they were pretty outstanding structures.

The fact that it was still in fairly good condition at it's age is a testament at how well it was built at the time.


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PostPosted: Sat May 25, 2013 2:11 pm 
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Wow, another one..

This time caused by a train collision.

http://www.usatoday.com/story/news/nati ... s/2360277/


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PostPosted: Sat May 25, 2013 2:19 pm 
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A Union Pacific train t-boned a Burlington Northern train at an intersection, Scott County Sheriff Rick Walter told KFVS-TV. The collision, which occurred around 2:30 a.m., caused one of the trains to derail and hit a pillar under the overpass, collapsing it.


Yeah, that's never good.

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PostPosted: Sat May 25, 2013 2:32 pm 
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Here is a fairly decent local news story (w/several videos) discussing some of the specifics of the design, and why the Skagit River bridge collapsed

http://www.king5.com/news/skagit-river- ... 76421.html


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PostPosted: Sat May 25, 2013 7:21 pm 
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Midgen wrote:
The fact that it was still in fairly good condition at it's age is a testament at how well it was built at the time.

Yeah, that's kind of what I was getting at. Really, when you stop and think of the construction, it's a marvelous thing. There was so much that the original engineers had no way of knowing. They probably guessed there would be huge amounts of traffic crossing those bridges, as well as the changes that would happen to U.S. society, but there was no way to know. Then there's all of the geological activity shifting the structures around, wind and weather activity...

And any calculations they made were done by hand. All of their models, everything... It was all done by hand. All of the CAD equipment that we take for granted today, they didn't have.

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PostPosted: Sun May 26, 2013 9:31 am 
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Also as an aside 75 from Toledo to Dayton is the suck right now. Actually it's just from here to Dayton.

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PostPosted: Tue May 28, 2013 6:50 am 
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Well, it's mired in constant construction around Piqua, if that's what you mean, Rori.

On a brighter note, north of either Troy or Piqua it'll be going to 70mph this summer.

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PostPosted: Tue May 28, 2013 1:20 pm 
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Kaffis Mark V wrote:
Well, it's mired in constant construction around Piqua, if that's what you mean, Rori.


And downtown in Dayton

And here in Lima

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On a brighter note, north of either Troy or Piqua it'll be going to 70mph this summer.

not if they don't get the road fixed.

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PostPosted: Tue May 28, 2013 1:37 pm 
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Rorinthas wrote:
Kaffis Mark V wrote:
Well, it's mired in constant construction around Piqua, if that's what you mean, Rori.


And downtown in Dayton

Well, that's a given. I think after 11 years, it's fair to simply consider the speed limit in Dayton to have officially changed to 45mph. Hopefully, someday, it'll change back. I'm assuming it will require legislative action to declare the construction finished.

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On a brighter note, north of either Troy or Piqua it'll be going to 70mph this summer.

not if they don't get the road fixed.

Mmm. Granted.

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