Pittsburgh bridge collapse 32

[Besserat]

It just happened

https://www.post-gazette.com/local/...int-breeze-squirrel-hill/stories/202201280075

 

[bridgebuster]

Let me clarify: I wasn't talking about a bridge with tracks and vehicles side by side on the same structure. If a grade separation was required, the railroad was responsible for the bridge.


That's two round trips on the extension, without the EZ-Pass discount.

 

[spsalso]

Let me clarify: I wasn't talking about a bridge with tracks and vehicles side by side on the same structure. If a grade separation was required, the railroad was responsible for the bridge

Oh. If there was an existing railroad, and there was to be constructed a road with a grade separation over the railroad, the railroad was responsible for the bridge?

I would have thought whoever arrived at the location second pays for the crossing. And that if one party wanted an improvement in that crossing (changing an at-grade crossing to a separation), that party would pay for it.

spsalso

 

[JohnRBaker]

Perhaps, but the railroad operators receives benefits as well, if nothing else than not having to maintain a grade crossing including gates and lights to say nothing of the infrastructure along the tracks required because of the crossing. And then there's the fact that the trains no longer have to slow down nor sound their horn (to the discomfort of the nearby residents) as they approach and pass the grade-level crossing. In our city, they've constructed three underpasses, replacing all but one grade-level crossing, on the mainline track (a double track shared by Amtrak, Metrolink and the freight operators).

John R. Baker, P.E. (ret)
Irvine, CA
Siemens PLM:
UG/NX Museum:

The secret of life is not finding someone to live with
It's finding someone you can't live without

 

[spsalso]

Here is an interesting discussion of funding for Riverside County grade separations:

Link

A quick read shows little railroad money included. The various physical structures (bridges, piers, abutments) involved would appear to be government owned and maintained.


spsalso

 

It's amazing timing that 3 days ago Biden planned this visit to Pittsburgh today.

I am amazed that none of the very smart engineers around here have not made that cause and effect linkage yet.

(That collapsed section is in a deeper state than previously you could even say.)


"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[phamENG]

yeah...and if you squint really hard, turn your monitor upside down, and then look out of the window 6 times, the bridge even forms the shape of a Q on the ground...

 

[FacEngrPE]

NTSB Accident Number HWY22MH003 Fern Hollow Bridge in Pittsburgh, Pennsylvania. Links to the B-Roll on YouTube (

https://youtu.be/OGyAXbVH8Qs,

https://youtu.be/qCbtWKa4m1Q)

and stills on NTSB Flickr album.

 

[spsalso]

Thanks!

Bridges look much bigger when they're on the ground.


spsalso

 

[Nukeman948]

NTSB release.

Link

[sub]This space intentionally left blank. [/sub]​

 

[CARunderscore]

NTSB release.

Link

Time for the news agencies to start incorrectly defining "fracture critical" to the public.

 

[bridgebuster]

Design is moving along; construction to begin in April. There was an article in Roads and Bridges today.

Link

 

[Diserian]

Update to the NTSB Report released:

https://www.ntsb.gov/investigations/Pages/HWY22MH003.aspx

AP news story:

https://apnews.com/article/pittsburgh-bridge-collapses-c038e5cdd72c19d3c192fa7a22732c53

 

[Sym P. le]

If I may summarise, as the bus is approaching the east end of the bridge (just prior to the east ends imminant collapse), the west end has already collapsed (behind the bus).

 

[FacEngrPE]

Fern Hollow Bridge Collapse: 3 lawyers file lawsuits against city BY JENNIFER BORRASSO MAY 16, 2022 / 6:33 PM / CBS PITTSBURGH The embedded video provides some interesting details.

 

Lawsuits ... make it official that this incident did indeed happen in the USA.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."