DISASTER Philadelphia: Tanker fire underneath I-95 causes entire northbound overpass to collapse

Doc1

Has No Life - Lives on TB
Concrete can fail rapidly and catastrophically when subjected to high temperatures. When concrete is setting, it is not 'drying' as many people believe, but goes through a process called hydration. This is where compounds in cement form chemical bonds with water molecules.

When you see old concrete on a bridge or highway, it looks completely dry, but it is still loaded with water. You don't see the water because it has combined with other compounds in the concrete, but the water is still there! When subjected to high heat, the water disassociates from these compounds and forms steam. This steam, rapidly expanding, violently blows small chunks of concrete away from the structure in a process known as spalling.

With enough heat and enough time, even large structures like the overpass shown in the OP will catastrophically fail.

Best
Doc
 

Red Baron

Paleo-Conservative
_______________
The fire is still smoldering.
---------------
205 watching now Started streaming 9 minutes ago
All north and southbound lanes are completely closed after a fire broke out on Interstate 95 in Philadelphia Sunday morning, causing part of the interstate to collapse.


LIVE: Portion of I-95 collapses in Philadelphia after tanker trunk fire​


View: https://youtu.be/2Qhdd6kbSRo
 

Macgyver

Has No Life - Lives on TB
Ok so looking at a map. That section was done in the last 2 years. The latest section done is just to the south.

The last section that was done was supposed to be a 3 year project. It got fast tracked by pendot because it was so bad and ready to collapse. They did it in 9 months.
 

CTFIREBATTCHIEF

Veteran Member
that will probably be closed for at least a few months. I've driven that stretch of 95 many times over the years. the alternates such as I-295 and the Jersey Turnpike are going to be a LOT busier this summer driving season.
 

wobble

Veteran Member
Too bad there wont be an inadvertent distractional boost to homeless peoples that reside under bridges where critical amd extremely flammable infrastructure components are stored.

Maybe this event can be used to highlight the potential dangers and damages caused by humans driving flammable liquids under critical infrastructures and really emphasize the need for AI Driver-Pilots while they spend the next 10 months updating this bridge.
 
Last edited:

Macgyver

Has No Life - Lives on TB
Rt95 and state road dot camera.
Screenshot_20230611-101648.jpg

Bunch of the others nearby are out. Failed bridge probably severed the fiber.
 

Macgyver

Has No Life - Lives on TB
If the south bound side is not destroyed they will probably tear out the barrier and make crossovers and do 2 lanes each way instead of the 4 normally.
 

Countrymouse

Country exile in the city
Same thing happened here in Atlanta on I75 or 85 ? A few years ago.

What a mess.
Yep--and ours was just because a homeless man set a bunch of cables on fire (apparently to keep warm). GA DOT had for some unaccountable reason stored masses of them under a whole series of bridges in that area, and the fire collapsed a main bridge. Atlanta traffic essentially suffered a heart attack.
 
Last edited:

Macgyver

Has No Life - Lives on TB
I think it's already been condemned.
If it not collapsed they will add steel work underneath to keep it from collapsing and use it till the other side is done.

Lots of these elevated areas had added supports because they were falling apart.
 

wobble

Veteran Member
Yep--and ours was just because a homeless man set a bunch of cables on fire (apparently to keep warm). Southern Bell had for some unaccountable reason stored masses of them under a whole series of bridges in that area, and the fire collapsed a main bridge. Atlanta traffic essentially suffered a heart attack.

The Cheshire Bridge bridge ALSO suffered a homeless fire resulting in condemnation that took over a year to fix.
And as the crow flies, Cheshire Bridge bridge is about five seconds away from I 85 bridge.
 

Macgyver

Has No Life - Lives on TB
Interesting I just checked ways to do from my house to work and it says 1:05. It's usually 50. I'm shocked it's not higher.
 

wobble

Veteran Member
The Cheshire Bridge bridge ALSO suffered a homeless fire resulting in condemnation that took over a year to fix.
And as the crow flies, Cheshire Bridge bridge is about five seconds away from I 85 bridge.
Are you aware of the bridge about 200 yards or so away from the I85 bridge that "caught on fire" and has been closed for months, creating a dead end on Cheshire Bridge?
It is supposed to take a YEAR to "fix" this one.


Just looking at a map and it looks farther than 200 yards..but when at this bridge you can clearly see the I 85 rebuilt bridge.
Also there was a train bridge fire in this swath just after the 85 bridge collapse.

Just very odd.
 

Melodi

Disaster Cat
The problem of homeless people setting fires that bring down bridges and create other issues has been growing for some time. And it is likely to get worse as the homeless problem grows as far back as the early 1990s, the Oakland Hill firestorm was traced to two homeless men who were sleeping up in the hills, and they were trying to keep warm and make coffee. Even in a heatwave, the California Coast gets rather cold at night. The poor guys had even tried to do the right thing. They knew there was fire danger, but their options were risk-freezing or making a fire. So after they made their coffee and things warmed up, they carefully put the fire out and buried it how you are supposed to. Under most conditions, that would have been enough. Still, it got so hot that day (I know I was working overtime on Saturday and thinking, "This is really dangerous fire weather.") It smoldered undetected for about 24 hours and then burst into flames on Sunday morning. I do wonder if something like that is happening with the bridges. And not all homeless people try to be as careful (or even know how to be as careful as those guys were).

It would also be a great "cover" for intentional terrorism, even done once removed. Pay some homeless guys a pittance (or give them drugs) in exchange for "forgetting" to put out their fire correctly or do it in a certain place. But my guess is, unless evidence comes up to say otherwise, these are accidents.

Accidents will get increasingly worse as the homeless population grows. And it will be compounded by people stealing copper, cables, and anything else they think they can sell or use to support themselves. Not all homeless people are drugged-burnout cases that laying around waiting to die. Some are, but some are not.
 
Top