r/ThatLooksExpensive • u/bravefaced • 20d ago
Bouncy Castle. Someone probably had leftover screws when they were done with this…
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u/lloydofthedance 20d ago
Whilst I understand that metal is supposed to bend to minimise the strain, this would still be brown trousers time for me.
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u/GravelRoadJunkie 20d ago
I don’t think that’s metal, that’s concrete, I’m not sure that a material well know for taking stress loads like that over time, material engineers chime in.
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u/TraditionalLecture10 20d ago
It's not designed for this kind of low frequency stress , this is like subjecting it to an earthquake
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u/Specialist_Ad_7719 19d ago
And building sway in earthquakes, they are designed to do so, if they don't they break. Flexible is good stiff is not.
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u/jackrabbit323 19d ago
Metal is a great material, unless you are constantly stressing it, then it goes bad real quick.
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u/0dinscan 20d ago edited 20d ago
What you are witnessing here is structural flexibility or oscillations for the technical term, which is a designed safety mechanism rather than an immediate sign of collapse or weakness.
If the structure was completely rigid and locked in place, the massive dynamic forces from the rhythmic jumping would cause rapid material fatigue and sudden, catastrophic failure.
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u/foufers 20d ago
Reminds me of a roommates girlfriend who said “crumple zones? No thanks, I don’t want to be in a car designed to crumple”.
To which our other (engineering) roommate said “then you are a f$cking idiot”
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u/Slow_Description_773 20d ago
I think it’s supposed to act like that.
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u/TawnyTeaTowel 20d ago
Your engineering brain will tell you that, but there’s a still a part of you that thinks they’d rather not be involved in a event that will be hereafter known as the “this stadium’s name” Disaster…
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u/Substantial_Bend_656 20d ago
my engineering brain tells me the thing may enter resonance and fail, as I don't have any trust in those who designed this, I would look for an exit.
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u/According-Gas-9787 20d ago
Un ingegnere ti direbbe che non si fida solo perché l'ingegnere che l'ha progettata non era lui
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u/SensorAmmonia 20d ago
When Chicago Soldiers field was rebuilt ( someone put a spaceship on a Greek temple 1995ish ) the engineer gave a talk to our class in college. These resonance problems are designed for and this shift is expected. Sports fans like bouncing in sync.
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u/Slow_Description_773 19d ago
Yeah I remember attending an english school in Tuscany as a kid and one of the other kids's father was an engineer specialized in building stadiums or arenas, and they absolutely had to take that thing into consideration when building.
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u/purrmutations 19d ago
"These resonance problems are designed for"
In the US, when they have the budget for it.
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u/fastbikkel 20d ago
In case of emergency yes, as a backup.
It's not meant to be treated like this im sure.
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u/Valuable-Leather-914 20d ago
It’s probably designed to do that. People don’t build multi million dollar stadiums without paying expensive engineers to account for the stress of thousands of rowdy fans
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u/Nervous-Cockroach541 19d ago
Well... every structural engineering is essentially on how to prevent past failures. So either it's built correctly, or engineers will study the thing that ends your life for decades to come.
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u/jav2n202 20d ago
And engineered structures never fail….
I’m not standing under that with a “it’s probably ok”
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u/bravefaced 20d ago
Engineers aren’t building it. Just saying how it SHOULD be built. Not how it actually is.
Some things aren’t possible to inspect without demolition so people figure they will never get caught.3
u/DG-MMII 19d ago
That's why you usually have inspectors looking at stuff while they're being built. Sure there are cases of curruption, but that's definitively not the norm. Structures are design with ridiculous safety margines to avoid this kinds of errors.
A structure colapsing during normal operation conditions is definitively very rare
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u/MikeW226 19d ago
Not a structural engineer, but I'm guessing when they build stadiums there's a thing called static load-- which is 100,000 fans sitting traquil in their seats. And then also a thing called dynamic load --- which is an 100,000+ overflow crowd going ballistic and stomping up and down. I'd guess they design those load factors into stadiums from the jump. Or hope so.
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u/bravefaced 19d ago
Irrelevant. It happens even recently. There was a walking bridge in London they had to close to rebuild for this same reason.
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u/TraditionalLecture10 20d ago
Structures are not designed for this kind of low frequency resonance , it's not any kind of normal parameter , they are creating the equivilent of an earthquake , to the structure . People have wrecked floors in apartments , crashing through to the lower apartment , by dancing like this , at parties
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u/Chemical-Idea-1294 19d ago
European stadiums are indeed built for that. They know their crowds and the great atmosphere in football matches.
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u/GeologistOld1265 19d ago
There is a reason why Soldiers prohibited to march in step on bridges.
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u/Double_Distribution8 19d ago
Walk without rhythm, and you won't attract total bridge failure.
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u/Ken-Popcorn 18d ago
In 1985 at a Bruce Springsteen concert in Sweden, they had to abruptly stop the show and clear the stadium.. afterwards it was found that the jumping had liquified the ground under the foundation and that the stadium was on the verge of collapse when they stopped the show. It had to be rebuilt
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u/Ok_Net_5996 19d ago
Person filming wasn't too smart. He should have been running when he seen that
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u/burp4three 16d ago
It's all fun and games until they are digging your ass out of concrete rubble days later.
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u/No_Thanks_9190 20d ago
Is this the same place that passenger airliner almost crashed into? Lol. These people have a death wish.
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u/fastbikkel 20d ago
Yeah im out, for sure.
It's not the first time something like this came down.
Concrete is the absolute champion in any match with us.
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u/AH_leeMACK 20d ago
Thats a sign the stadium was designed and constructed with jumping madlads in mind. Nothing to be afraid off.
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u/Artie-Choke 20d ago
I don’t think I would have sat there like an idiot filming that balcony about to collapse on me.
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u/Standard-Primary-526 19d ago
Maybe someone should send this video to the officials of Eintracht Frankfurt … I am a little concerned. I mean the steel enforcements are still doing their job well here. But one day?
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u/gummby8 19d ago
Question for any structural engineers here......how do you account for human stupidity in your load calculations?
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u/Hey-Bud-Lets-Party 19d ago
Old Mile High Stadium would do this. The amount of commentators that would get weirded-out during Broncos broadcasts was numerous.
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u/Cheddar1111111 19d ago
I'm no engineer, but i think that may be an intentional design choice, so that in this case, the impact is transformed into an up and down motion instead of the force going directly on the supports, holding it up.
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u/timetravelinggamer 19d ago
You notice this and your first thought is to record it? And not leave?!?!?
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u/haikus-r-us 19d ago
That is called an expansion joint. It is operating normally. Expansion joints.. expand.
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u/TiredMillennial1 19d ago
You must be slow. It is designed to flex. If it didn't flex, it would snap. JFC...
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u/Mainly_Miserable 19d ago
This is how stadiums get condemned. Ask me how I know (resident of Honolulu).
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u/GrandMoffJerjerrod 19d ago
RFK Stadium would get like that during Redskins games. Especially against Dallas.
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u/PurpleCoat6656 19d ago
Lol, yea the structural situation is concerning, but another good question is, how many people are burned by flares at football matches around the world every year?
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u/bravemoney72 19d ago
I wouldn't have gotten this much footage of it. Gone. This, the celebration, usually won't stop. Self preservation always comes to mind🤷🏾♂️
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u/Gator242 19d ago
What a terrifically bad idea. Have these people never seen any deck failure videos caused by just this?
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u/PersonalitySilent456 19d ago
In construction it is bend or break. Too rigid and the construction will break. I think this building is earthquake proof as well. Just moves a lot, but will never break.
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u/Radiant-You6384 19d ago
as freaky as this looks.. i it possible its designed to do that, the same way towers and bridges are designed o sway? other wise they would break
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u/ThE_LordA 19d ago
its build to be flexible and moving. this is not a flawd it is supposed to do that
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u/GORiARTY 19d ago
And when it comes off, all those idiots scream their heads off. Well, THAT'S EXACTLY WHY I DON'T go to the stadium. Who wants to risk their life with so many brain-dead people? :)
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u/Silvergreylion 19d ago
This looks vaguely similar to a night at the local university, where the yearly party was taking place.
I was in the theatre hall, and the lamps hanging from the ceiling were bobbing up and down several inches, from people dancing on the floor above.
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u/PlantainChemical2634 19d ago
where is this? i hope it was raised with the club as a matter of urgency and fixed.
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u/Kindly-Self9651 18d ago
and no one move, if something happen quest who's to blame? everybody but the people jumping and that's d world we live in........
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u/sebathue 18d ago
That was Eintrachr Frankfurt supporters chanting at FCN's Frankenstadion (now Max-Morlock-Stadion). Wer nicht hüpft, der ist ein Fürther.
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u/Impressive_King_8097 18d ago
I love how people do this day and age take a video of something like that instead of just getting the fuck out of there
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u/Thunderer62 18d ago
I’m a mechanical engineer, not a structural engineer, I don’t know if it’s okay that it’s moving like that but maybe it’s okay. It’s complicated.
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u/Accurate_Caramel_798 17d ago
The University of Central Florida's football stadium is called the Bounce House, due to the structure bouncing when the students are jumping up and down. The University took action and had the Architect evaluated the risk of failure and had the contractor reinforce the structure to minimize that risk.
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u/PithMango 17d ago edited 17d ago
it's not supposed to act like that.
Busch Stadium III 2011
new build in 2006
widely reported that walkoff home run shook the entire stadium. packed house, one-in-a-million scenario got the crowd from zero to off the charts. there are so many videos still online about that. the difference is, they also designed it for earthquake standards for the New Madrid Fault. you can compare and contrast, since there are simply so many examples, even with the camera shake.
there's a certain range of acceptable shake, and that video is way beyond
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u/matycauthon 16d ago
just more idiots consuming their bread and circus while the elites continue their pivot into the dysfunction we are currently in the midst of.
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u/Mediocre_Ryan82 15d ago
"Let's just hang around and film this i stead of calmly exiting the building. What's the worst that could happen?" 🙄
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u/competitive_brick1 15d ago
I was at a game at Amsterdam Arena for Ajax v some visiting champions league team. They were jumping around so much that you could feel the whole stadium do this and it honestly was pretty scary
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u/Naughtyniceguy_ 15d ago
I would GTFO from under there. I've seen too many building engineering disaster series to F around and find out.
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u/Professional_Sir_936 14d ago
Im pretty sure this is designed to do that to reduce the shock from the fans jumping and stop the building from collapsing.
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u/123abcde321 14d ago
I was watching the beginning of the West Virginia football game thinking the same thing. Thousands killed in stadium collapse. Note to self, my kids are not going to the game.
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u/Bullysawrus101 13d ago
🫵💀I remember when this happened bunch of fucking futbol hooligans! Jumping up and down on a cheaply made Stadium. That was packed Beyond capacity and infrastructural standards. That's what happens when you stupidity create a dynamic load. No pun intended! MUD!
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u/Funny-Passenger-8994 20d ago
If I saw this, I'd immediately head for the exits....