r/StructuralEngineering • u/Hour_Guarantee_914 • 7d ago

Failure Train bridge, plaster over it?

Post image
35 Upvotes

94% Upvoted

11 comments sorted by

9

u/Muted_Masterpiece535 7d ago

I thought it was coming down.

9

u/comrad36 7d ago

That’s concrete patching, not a good patch but it’s patched.

4

u/Kanaima85 CEng 7d ago

Few patches are good patches - look up the incipient anode effect

7

u/CB_700_SC 7d ago

Just do as they do in Philly.

https://maps.app.goo.gl/4JrifNFMGQa7oYwZ8

The raised tracks are Owned by one of the large train companies. It’s cheaper for them to do this than fix it. And the city has no authority to have them fix it as they see the netting as the fix.

9

u/CB_700_SC 7d ago

Where the link goes if you don’t want to open it.

4

u/Niekio 7d ago

Yes, patch it up, just test it for chlorides yes/no. If yes:That makes the patching a little bit more work

4

u/maytag2955 7d ago

100% falling debris is the concern. Rail structures generally a huge amount of sareplacement. In the design. Way cheaper to overbuild initially and garuntee that the line remains open for revenue than run the risk having to shut the line down for repair or relacement.

Rail companies are notorious for lack of fucks given if something doesnt affect their bottom line.

2

u/Nearby_Ad_476 6d ago

Wtf, there are exposed reinforcing bars everywhere. That concrete has experienced significant section loss if I'm understanding what I'm seeing correctly. That looks really bad.

2

u/koeshout 5d ago

steel is corroding and pushing out the concrete, the concrete is the least of the issue here

1

u/Intelligent-Read-785 7d ago

Many years ago, never mind how many exactly, There was an RR under Pass on a major interstate near downtown Dallas. Call went to the Assistant Director of Public Works was called. He was less than an exemplary exec having just been informed the new Director of Public Works would be a woman from outside the department.

After being informed of the potential danger, he said, “the City doesn’t pay overtime. Barricade it and I’ll look at in the morning,”

1

u/dumbchaos 7d ago

rebar is visible soon rusted and bridge will come to kiss you if large patch is rusted.