Submitted by PienotPi t3_10x5i7l in philadelphia
Comments
DisciplineShot2872 t1_j7qjjld wrote
That was my thought on the falling facade. Eventually, things fail, especially in those sorts of conditions.
Indiana_Jawns t1_j7quuwe wrote
Freeze/thaw cycles can damage stone if there’s water, since it’s the expansion of the ice that caused the damage (same thing that causes potholes). I think in this case it’s more likely that cold just makes metal brittle and more likely to crack (as noted in the article).
DisciplineShot2872 t1_j7qv0ap wrote
Got it. It's been a while since I've done materials stuff. Thanks!
MonsterNog t1_j7qr6p0 wrote
Who’s the wise guy who said “what if this happens in Philly?”
[deleted] t1_j7r3qof wrote
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zwirjosemito t1_j7ql72l wrote
Just for context, this happened Saturday night, not today.
thatboul1000 t1_j7t6mx8 wrote
Thanks because I was like, “again?”
NonIdentifiableUser t1_j7qmsjh wrote
Not sure why the article calls the MFL light rail, it’s most certainly not.
jpstanton93 t1_j7rde8n wrote
Yeah. It may run on a weird gauge (PA Trolley Gauge) but it's still heavy rail.
mortgagepants t1_j7rkmne wrote
pa trolley is bigger i think right? standard is 4'8".5 so its like...even "heaver"?
eleboil t1_j7ry3gx wrote
Defiantly heavy rail, it is also wide gauge unlike the Broad Street subway which is standard US rail gauge.
Hoyarugby t1_j7r1kip wrote
This is the train that derailed last weekend, not a new one
[deleted] t1_j7rkas7 wrote
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[deleted] t1_j7uob2q wrote
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diatriose t1_j7qi1dx wrote
r/UnexpectedThomastheTankEngine
AbsentEmpire t1_j7qh0so wrote
I wouldn't be surprised if these sudden cold snaps followed by warm weather have weakened some of the tracks.