/sci/ - Science & Math

https://en.wikipedia.org/wiki/Big_Dig_ceiling_collapse

Less dramatic than previous article but as a Bostonian I personally had to deal with the maddening traffic congestion the caused by the resulting tunnel closure.

I swear, the deepest circle of hell must be an exact replica of pre-dig Boston where the damned are condemned to aimlessly wander in standstill traffic forever. Also they're all driving PT Cruisers with broken AC.

A classic

>>11933761
Lmao my uncle worked on the Big Dig and said it was full of complete fucktards who didn't want to work and would do dumb shit like throw trash into concrete pours
God help anyone driving through Boston

* Shatters public confidence in NASA and space exploration *

>https://en.wikipedia.org/wiki/Space_Shuttle_Challenger_disaster

>https://en.wikipedia.org/wiki/Bhopal_disaster

Remember when India accidentally committed chemical warfare on 20,000 of its own people?

China.

>>11933751
pretty cool doc, thx for pointing to it

https://youtu.be/AWOYoG7HzNQ

>>11933907
The Seconds From Disaster series details dozens of engineering faults that lead to catastrophes

>>11933799
>a bit of ice gets in your o-ring
>heh, nothing personnel kid

>>11933751

>Those who could walk were instructed to leave the hotel to simplify the rescue effort, and morphine was given to those who were mortally injured.
>Rescuers often had to dismember bodies to reach survivors among the wreckage.
>A surgeon had to amputate one victim's crushed leg with a chainsaw.

Thanks for ruining my morning. I need a fucking drink.

I'm an architect and I'm still amazed how much trust we put into buildings. I wonder if people realize that when they step into a building, it's basically just stuff stacked on top of other stuff. Thank God we have engineers who calculate all that shit.

>Its a reddit colonization thread
Excellent

>>11934008
Isn’t it an architect’s job to figure that shit out, or are you a literal “ideas guy”?

>>11934047
Depends. We don't really calculate the loads or statics and at least here in germany, all plans have to be approved by a state engineer anyway.
Basically we start out as idea guys, get all those specialized people on board and coordinate them to do what we want. But we also design the details of the construction, and we do come up with the general load bearing structures.
Kinda depends on the project too. For a small house we'd maybe even calculate it ourselves but with bigger projects there are always specialists.
I'm pretty new anyway so I still get to be the ideas guy, mostly because I don't know anything about the real stuff.

>>11934047
Bigger the project and the firm the less actual calculations architecture involves. At some point it devolves into "this looks nice, some engineer will figure out to make it work"

>>11934008
>Thank God we have engineers who calculate all that shit.
These days it's, Thank God we have engineers who rely on software written by people on the other side of the planet and poop in the streets to calculate all that shit.

>>11934203
Must be fucking terrifying to have a building collapse on you. I wonder if you'd even realize what's going on while it happened..

>>11933926

It was brittle fracture from cold temperatures, not ice buildup.

>>11934008

Aren't they under even more pressure than airlines to make sure their structure doesn't suddenly shit itself with people inside?

>>11934688
I guess so. But we've been building buildings a bit longer than planes, so I guess we got it figured out quite well.

>>11934203
wasn't that one bridge that was fully made by female engineers, an that a group of male engineers advised for structural problems and they chose the ignore the men?

>https://wikipedia.org/wiki/Sultana_(steamboat)

When steamship operators forget their passengers aren't fucking sardines in a can.

hehehehe would be a real SHAME if your cargo door just HAPPENED to come unlatched....

>>11933751

>>11934739
Yes. The reason why they ignored the other engineers (not sure if they were all men or not) was because they put the numbers into their simulation software and the software said everything was good. They didn't care what the manual calculations said, probably because they weren't capable of doing them, much less understanding them.
If I could bet on the outcome of the investigation, I'd bet on it not even being the fault of the software but rather the "engineers" not understanding how to properly set up the model in the software. Garbage in, garbage out.

>>11934783
Too soon.

>>11934739
>>11934792
The investigation already has an outcome, you can watch the NTSB report here: https://www.youtube.com/watch?v=fdUf-_el9vA

The "all-female team" were construction workers (Munilla), not design engineers. The bridge was engineered by Figg, and the design was retarded, the company that checked Figg's work also fucked up and did a poor job. Any of them could have shut down the road when massive cracks started forming and none did, so they all fucked up.

>>11933761
I lived in Quincy growing up and I remember seeing "Big Pig!" signs protesting the boondoggle in the mid 90s. 8 billion dollars for a few miles of highway. I'm glad I got the fuck out of that shit state at the turn of the millennium.
That project was an administrative failure resulting from a bunch of dirty pockets filling each other up with no oversight. The shit work was a feature for them, not a flaw.

>>11934813
>The "all-female team" were construction workers
You got greedy there. Try again.

>>11933799
>investigation into what happened
>engineer walks in with a bucket of ice and an o-ring

It's the funniest debriefing ever.

>>11934783
>>11934795
I follow some pro-China types on Twitter because they sometimes have good hottakes, and it's always bizarre watching the hardcore cope when eventually someone points out that the dam is fucking bowing. Like, holy shit, does it really fucking matter if America's roads are collapsing if the collapse of the Three Gorges Dam will literally drown tens of millions?

Fucking China, goddamn.

>>11934825
You can watch the video if you like, and as much as I hate to defend diversity hires, the actual engineering was done by FIGG Bridge Engineers. MCM (the all-female team) were managing and outsourcing the design to FIGG, and Bolton Perez were tasked with checking FIGGs work. FIGG fucked up the design, Bolton Perez didn't do correct math, and MCM just organized the shitshow.

img src: https://facilities.fiu.edu/projects/BT_904/MCM_FIGG_Proposal_for_FIU_Pedestrian_Bridge_9-30-2015.pdf

>>11934768
tribute to all the victims of the DC-10. thanks to them, we all fly safer.

>>11934839

Wat?

Sauce.

>https://wikipedia.org/wiki/Lake_Peigneur

Probably the weirdest engineering disaster of all time.

>>11934869
>Construction workers
Try again. You lied.

>>11935598
he is correct. why are you so adamant about reducing this to a gender issue?

>>11934844
Bowing?

>>11935598
>Lying to accuse someone else of lying because you're not comfortable with the literal objective truth
kys faggot your kind has ruined discussion on 4chan

>>11934869
>Get to list of FIGG designers
>One of them designed a bridge I drive over every day with an unsurvivable drop if things go wrong

>>11935636
Deflecting. I really, really hope that it blows. It will be glorious. China owes every American for what was at worst an act of bioterrorism, and it doesn't appear that Trump is willing to go to war. It would be nice if the debt that they now owe us took care of itself.

>>11935756
Got pics?

>>11935761
>>>/pol/269514829

>>11935672

Wear a life jacket when you go to work.

Everyone has seen the video of the Proton M launch failure on YouTube. But what they don't know is that the cause was the angular velocity sensors being installed upside down

>>11934203
This is the first image that comes to mind

>>11934203
This is the second image that comes to mind

These disaster threads are almost overwhelmingly civil engineering failures. Why doesn't anyone talk about electrical engineering failures?

>>11934839
Engineer?! it was the motherfucking Richard Feynman himself! The man takes no guff. QED

https://www.youtube.com/watch?v=6TInWPDJhjU

>>11935938

Post an example then.

>>11935938
Electrical engineers are far more intelligent and physiologically incapable of making mistakes.

>>11935981
>>11935983
>https://en.wikipedia.org/wiki/Capacitor_plague
>https://en.wikipedia.org/wiki/Therac-25
>https://en.wikipedia.org/wiki/Xbox_360_technical_problems
>https://en.wikipedia.org/wiki/Apollo_1

>>11935997
Apollo 1 was more than an electrical engineering failure. The badly bundled wires were just what set it off

>>11936188
F

>>11935997
Also:
>Chemical engineering failure
>C*mput*r sc**nt*st (May allah forgive me for saying this phrase) failure
I'll give you the 360 being a pile of junk
>Electrical aspect of failure was only the catalyst for every other bad design or modification to catch fire or prevent escape

>>11935590

>we accidentally an entire lake

Holy shit.

>>11934813
female construction workers ??

>>11934821
Every single highway project is just dirty pockets circlejerking and reaping the benefits while fucking the drivers on the roads. Hell, where I lived, they tried to expand Texas state highway 107 from two lanes to three lanes and for 1.5 years they didn't do jack shit. Just scraped the road, repaved it and left it the same. I think the original contractors were affiliated with a local politician and eventually went bankrupt. A second contractor came in and gave up and just repaved the road in the end.

>>11935598
>this is your brain on /pol/

>The resultant sinkhole swallowed the drilling platform, eleven barges holding supplies for the drilling operation, a tugboat, many trees, and 65 acres (26 hectares) of the surrounding terrain.
lol

>>11936399
If you like that, try Salton Sea

https://en.wikipedia.org/wiki/Aral_Sea
>we accidentally an entire sea
>oh and we left and abandoned bioweapon facility in the middle of it for hoarders to pick through

>>11935938
Here ya go: https://en.wikipedia.org/wiki/2016_South_Australian_blackout

tl;dr the entire state of South Australia, 1.5 million people, lost electrical power after a large windstorm resulted in a cascade of improbable electrical interconnector failures, resulting in all the local power stations constantly tripping out and a day long struggle to restore power. Emergency generators at hospitals ran out of fuel due to the length of the cut, cryogenic facilities lost all their samples, and smelters were out of action for months after everything cooled down. Cue panic as the authorities desperately try to get mothballed gas power stations back up and running.

Power supply here has always been shockingly bad by first world standards, but this was the biggest fuck up in living memory. Something good came of it though with Elon Musk building his big battery here as a proof of concept. I can't actually remember the last time we had any blackouts or brownouts since the battery came online.

>>11935756

How are THEY the bioterrorists when it's the CIA who broke into the lab?

>>11936750
It wasn't a particularly fun night. I spent the evening sat at home in the dark, and my workplace had to throw out thousands of dollars worth of spoiled food from the freezer.

>https://en.wikipedia.org/wiki/Boeing_737_MAX_groundings

>>11935636
Some conspiritards found a badly stitched together satellite composite image of the three gorges dam and let their imaginations run wild.

>>11933761

Related (sort of):

>https://en.wikipedia.org/wiki/Merrimack_Valley_gas_explosions

No homeowner in the state is ever going to trust this company again.

>>11936751
>Ching chongs aren't people, therefore they can't be evil/incompetent like actual people (whites/Americans) are. Thus it must be the US's fault.
Stop shitposting with your soft bigotry.

>>11937357
Listening to people leave work and class early to make sure their house didn't explode was a trip

Here's the biggest engineering fuckup in human history

>>11937132
That's a big one holy shit

>>11933751

And if anyone seeing this post thinks
>lifeboats
then you're a retarded NPC.

No, the engineering fail has nothing to do with lifeboats.

https://en.m.wikipedia.org/wiki/Chernobyl_disaster

> let's put a fantastic moderator on the ends of our control rods so that when we drop them all to shutdown the reactor in an emergency, we actually turbo charge it.

https://www.youtube.com/watch?v=gBT7pBF_XeA

>>11938148
not an engineering failure if it was intended to sink

>>11935636
Retards believe a shitty morphed satellite pic means the dam is gonna collapse

>>11937132

>McDonell Douglas corrupted Boeing from beyond the grave after the 1992 merger

It's almost poetic.

https://en.wikipedia.org/wiki/Brumadinho_dam_disaster
https://en.wikipedia.org/wiki/Mariana_dam_disaster
Also electric showers for some peak Brazilian engineering

>make rocket to replace Saturn
>have a good TSTO design
>let the design get fucked up by airforce and congress
>It's now a bastard system that segregates the main fuel tank from the engines, and have two giant SRBs to compensate for not using liquid fuel rockets
>use Hydrolox, which is stored in a giant fucking tank made out of fragile foam
>foam disintegrates from vibration caused by SRBs
>chunks of foam can hit the vehicle, punching holes in the heat-shield
>vehicle is made out of 40 thousand unique tiles glued to it's fragile fiberglass and aluminum frame, which fragile carbon tipped wings, which are super expensive to refurbish
>SRBs explode when launches in slightly cold weather
>due to SRBs it's impossible to abort launch without the entire vehicle exploding due to hydrolox tank
>lose vehicle from SRB exploding
>lost vehicle from breaking apart during reentry after hole punched in carbon-carbon wing
>kill 14 people
>cost 500 milliong per launch
>eventually need 2 vehicles prepped for launch for lmao 1 billion per launch
>can barely put a decent payload in LEO and can not be used futher
At least it could recover satellites and looked really fucking cool at launch

find the problem

>>11936752
ngl, that's comfy af

>>11933859
pepperidge farm remembers

>>11933875
come on, don't make me do an image search.

>>11935590
Well, you SAY that...

https://en.wikipedia.org/wiki/Great_Molasses_Flood

>>11935598
Mental illness.

>>11935590
that is fucking nuts
>reversed the flow of a canal which flows out into the gulf of mexico, leading to salt water flowing INTO the lake
lmao

>>11934739
I hear the "female engineers" line a lot when it comes to this bridge collapse but I've never actually seen any hard proof that this bridge was built or designed by a team of female engineers
I would appreciate a source for that claim if anyone has one

>>11933779
>throw trash into concrete pours

Absolutely based.

>>11938560
some guy in this thread literally posted a source saying they were female construction workers and that the engineers who designed the thing were a totally different group of people

Contributing with an environmental engineering disaster
>https://en.m.wikipedia.org/wiki/Cane_toads_in_Australia
This is why modern environmental engineers (at least in australia) are so cautious when it comes to direct intervention in a natural system

>>11938584
Forgot pic

https://en.wikipedia.org/wiki/Mars_Climate_Orbiter
>pound-force seconds
lmao

>>11937237
What am I supposed to be looking at?

>>11938622
https://en.wikipedia.org/wiki/Restrictions_on_geographic_data_in_China#Coordinate_systems

>>11938187
whats the deal with this guy
he talks some sense and some shit

>>11935766
Holy shit /pol/ is dumb as a box of rocks.

>>11938625
Thank you

>>11938570
No he didn't. Go read it. Nowhere does it say the women were construction workers. That's something he made up entirely because it fit his narrative. Go on, go look. Go find the female construction workers. You can't find them because they're not there. He lied and you ate it up. You should ask yourself why you're so gullible especially when the source material is right there.

The US Chemical Safety Board Youtube has lots of high quality animations of different chemical engineering plant fails.
https://www.youtube.com/user/USCSB

>>11934762
i just watched a long documentary on this. interesting. and horrendous. typical greedy corrupt business and bureaucrats
and those poor victims, the poor bastards

the Sultana was one helluva an event

>>11937237
OMG the Panama Canal is collapsing!

this is the end of modern shipping and no one is talking about it!

March now.
The whites supremacists are responsible for this.!
I demand reparations for LGBTQ former slaves!

Mars Polar Lander, one of tax payers' wrost nightmares

>The accident occurred on 17 August 2009 at 08:13 local time (00:13 GMT).[5] There was a loud bang from turbine 2. The turbine cover shot up and the 920-tonne (910-long-ton; 1,010-short-ton) rotor then shot out of its seat.[4] After this, water spouted from the cavity of the turbine into the machinery hall.[6] As a result, the machinery hall and rooms below its level were flooded.[6] At the same time, an alarm was received at the power station's main control panel, and the power output fell to zero, resulting in a local blackout. The steel gates to the water intake pipes of the turbines, weighing 150 tonnes (150 long tons; 170 short tons) each, were closed manually by opening the valves with hydraulic jacks keeping them up[2][4] between 8:35 [2] and 9:20 hours[7] (9.30 by official report[2]). The operation took 25 minutes, which is near the minimum time (highest speed) allowed for this operation.[8] The emergency diesel generator was started at 11:32.[6] At 11:50, the opening of 11 spillway gates of the dam was started and was finished at 13:07.[7] 75 people were later found dead.[9]
hello, based department???

>>11938538

This sounds funny but it's actually fucking horrible.

Imagine drowning in a sea of molasses, and the harder you struggle the deeper you sink. According to the wiki 2 of the victims were children.

>>11933859
>20,000
It was half a million.

>>11934611
what? I thought it just shrinks below tolerance in the cold

>>11936399
the most surprising part is that they got out unscathed

>>11933751

https://www.youtube.com/watch?v=iv5g2MhPT5I

>>11933799
>engineers calculated safe operating temperatures
>it's below the minimum
>engineers said don't fly
That was a management fail, not the engineers.

>>11938455
fixed

>>11938599

NASA has turned into such a fucking embarrassment that it should no longer be allowed to have ANY role in space exploration.

Imagine if the FAA built all of the world's planes and they were only single-use. That's (mostly) the situation we're in right now.

>>11933751
I stayed in that hotel a few years ago. You can feel swaying in the elevator. Did not like. Do not trust.

>>11933919
Good book: https://en.wikipedia.org/wiki/When_Technology_Fails

>>11935938

Because when electrical engineers fuck up at the very, very worst it results in a plane crash, which affects a few hundred people. When civil engineers fuck up they can ruin an entire city for years.

>let's put nuclear catalysts on the tips of our control rods it will be cheaper that way lmao

>>11941272
>Lockheed Martin writes program outside of design specs
>NASA is bad
NASA should have checked Lockheebs work but you wouldn't expect a contractor to use different units from what they are explicitly told to use.

>>11938599
imperial units have tremendous untapped shitposting potential

>>11941595
That's why civil engineers are the real chads of engineering for the amount of responsibility they accept compared to the other disciplines.

>>11941961
It's even worse than that. Pound-force is maybe the worst unit ever conceived. The intuitive force unit in imperial units is lb * ft/s^2(in b4: actually pound is weight not mass). The pound-force is equal to the gravitational force one pound of material experiences on the surface of the Earth. So instead a pound-force is equal to 1 lb * 32 ft/s^2.

>>11940476
I WARN THEM! I WARN THEM WHAT HAPPEN WHEN YOU MAKE KUNG PAO CHICKEN TOO SPICY

>>11933799
>>11933799
Did you know Big Bird was set to be on the Challenger? There is a timeline not far from this one where big bird died in the Challenger on live tv

>>11942111
That is my favorite space flight fact, shame a giant bird suit was hard to wear in a cramped can.

>>11933751
that was a construction fuckup not an engineering fail

>>11933859

Why do they need to fence it off?
WTF would anyone do to solid stone statue of a non-controversial figure?

>>11942591
My guess is the plaque says something like "2,000 died" and people keep adding more zeros to make it more accurate.

>>11935919
And inorder to install the sensors upside down, workers had to remove tabs on the sensors specifically designed to prevent them from being installed upside down.

>>11935938
Does the IPhone antenna debacle count?
>your holding it wrong

>>11935997
>Xbox 360
Never got my $400 back for at faulty piece of shit, thanks Microsoft.

>>11942817

Good grief...

>>11942824

esplain pls

>The technical problems at San Onofre have plagued operators since construction as quoted in the July 12, 1982 edition of Time Magazine wrote, “The firm Bechtel was … embarrassed in 1977, when it installed a 420-ton nuclear-reactor vessel backwards” at San Onofre.

>>11936192
>F
yeah, several hundred, if not thousands of them

>>11942591
Kids and retards with spray cans I guess

>>11942591
are you seriously asking this now? in an era where they destroyed the statue of an elk for being racist? or deface statues of civil rights activists?

>>11943372
>Spend tens of millions building a plant
>Don't bother keying the reactor vessel housing so it can't be dropped into place incorrectly.

in 41 AD, Emperor Claudius took up the ambitious plan of regulating the flow of the Fucine Lake. To achieve that, Claudius dug a 6-kilometer-long tunnel through the hills near Avezzano to divert the lake waters into the Liri River. Over thirty thousand workers, mostly slaves, toiled for eleven years digging, levelling and tunneling through the hills. Such a grandiose project had never been attempted before. Landslides and collapsed tunnels claimed untold number of lives. The work almost proved to be a disaster when a miscalculation by the engineers caused the lake waters to come rushing out too soon nearly drowning Claudius and his party, who had gathered on a floating platform on the channel.

>>11943412
Or dog fouling.

>>11941971
I remember one of my structure's professors talking about when she went to school, a professor would instead of marking problems wrong with an 'x' he would use a skull and crossbones stamp.

>>11943485
Simply more proof that engineers are retards

>>11942749

Kek

>>11941971
>civil engineers are the real chads of engineering for the amount of responsibility they accept compared to the other disciplines
>posting this shit opinion when Chernobyl has already been posted at least twice in the thread
Nuclear Engineering is the undisputed KING of big oopsies.

>>11942591
Poo on it

>>11935590
>>11936399
https://youtube.com/watch?v=gNjR2NMTLLg

>>11937237
Actually it's because the area is flooding now

>>11944666
>80 deaths
lel
Mogged by chemchads

The USS Iwo Jima had a boiler valve need maintenance. Poor work practices caused someone to use a bolt that was an incorrect material. Everyone in the engine room died when it exploded, basically got steam cooked. This caused the Navy to cause large sweeping changes to work practices on high energy systems, and caused them to ban all painted bolts so they can't be confused with the wrong one

>>11941636
The design wasn't really the problem. The real problem was the training of the operators and the operating procedures of the USSR

>>11942239
Did you read the article, idiot? The original design was only able to support 60% of the minimum load as required by KC. The original design would likely have been the same outcome, just at a different time.

>>11938148
>And if anyone seeing this post thinks
>>lifeboats

The ship had multiple failures that lead to a body count that high. Nobody thinks the lack of lifeboats caused the ship to sink.

>>11944554
After grading our midterms, my Statics professor said for the good of society he hoped we all failed out of school and never became engineers. Probably would get fired for saying something like that now but it did lead to the class better learning the material the rest of the quarter.

>>11945009
based

>>11933859
>>11942591
If they didn't fence it off, it would be pooed on.

>>11934739
>>11938560
>>11938570
It's bogus bullshit 4chan made up and then subsequently believed. The construction workers were men too.

>>11945277
>4chan
/pol/ AKA Faceddit

>>11939936
Sounds like a pretty sweet death.

>>11945287
Pretty much.

>>11933875
>>11938531

It's the Hard Rock in New Orleans. I visited NOLA not too long after it happened.

It was especially notable because there was a worker (maybe more than one) whose corpse was just kinda dangling from the wreckage, and they couldn't get up to retrieve since the structure was still so shaky. I think he was just hanging and exposed for like 3 weeks.

I didn't want to try and see while I was there.

>>11945299

Oh fugg nvm just looked it up

Apparently those dead dudes are still up there...this happened in October 2019

>>11945299
>>11945327
Alexa, compute the odor!

>>11943092
https://en.wikipedia.org/wiki/IPhone_4#Antenna
The antennae was designed into the exterior of the case in such a way that holding the the phone could cause it to short, leading to loss of signal.

>>11934342
Probably something like this
https://www.youtube.com/watch?v=ppAeMWFCqC8

>>11945299
>>11945327
>>11945340
That's so sad and I am disgusted that something this shameful happened in the United States. I'd expect this type of shit to happen in China or India. USA becomes more 'turd' world every day.

>>11942824
fucking itoddlers

>>11945299

That's just gross.

>>11933799

*indirectly causes yet another disaster 2 years later on the other side of the country*

>https://en.wikipedia.org/wiki/PEPCON_disaster

>>11933859
>By 11:30 p.m., workers in the MIC area were feeling the effects of minor exposure to MIC gas, and began to look for a leak. One was found by 11:45 p.m., and reported to the MIC supervisor on duty at the time. The decision was made to address the problem after a 12:15 a.m. tea break, and in the meantime, employees were instructed to continue looking for leaks. The incident was discussed by MIC area employees during the break.

This article is hilarious except for the fact thousands of people died.

https://wikipedia.org/wiki/Indiana_State_Fair_stage_collapse

IDK if the Mystery Flesh Pit disaster counts cause it wasn't really an engineering failure, but I can't believe those retards didn't even know what aconitine would do to that thing
they're still finding festering piles of vomit leeching into the groundwater 14 years later

>>11947772

nigga wat

>>11948239
It was extremely rainy on the fourth of July, in 2006, and the park operators let some like gizzard or something fill with water and it choked. There was a firework concert later than the park was normally open and they didn't remember to not turn the computers off for updates like they normally do so it choked right when they were off, swallowed like six or seven hundred people. Then they tried to dose it with aconitine in order to get it to sedate it but they'd never tried that dose before and it just made it throw up caustic vomit something like a couple hundred feet into the air, and the wind carried it for miles. There was a really big lawsuit afterwards and now the whole park is shut down, I think there's just a plant there that produces sedative to keep it inactive.

>>11947772
>>11948289
This trash was created by r*dditors. Go back and dont bring their shitty content here

>>11948289
That reads so badly. If this is what ruddit thinks is good writing it's no wonder Harry Potter is praised so much.

>>11948289
Kill yourself you sub human cretin

>>11938148
>Lets build bulkheads so water can’t penetrate the whole ship
>Walls only go half way up
They were asking for it

>>11934768

On the other hand, because nobody wanted them for passenger service, FedEx bought hundreds of mothballed DC-10's for pennies on the dime.

If you've ever ordered something on Amazon, chances are it flew to you on a former passenger DC-10

>>11933778
Brought to you by every teacher that is teaching resonating frequency

>>11934869
>MCM (the all-female team) were managing

So the buck stops there?

>>11949847
>cargo_door_design_on_the_DC-10.gif
pls explain

>>11933751
I don't know if this is the type of fail you are talking about, but I set out five years ago to get an engineering degree through a community college to state school transfer program, and ended up graduating last month with an engineering technology degree.

>>11951174
>engineering technology degree
my condolences

>>11951174
I hope you make it, anon

>>11950952
depressurization

>>11951244
>>11951434
Is there any hope for me to correct this later with a Master's in engineering, or am I pretty much screwed for life?

>>11933907
>240p
mmm no thanks

I need help fellas, what do i choose, civil engineering or mecanical engineering

>>11941961
When it comes to unit conversions, Gimli Glider comes to mind, though there were other factors at play too. Luckily Pearson was an experienced glider pilot.

>Windows are so reflective they melted a car
>could potentially melt the street and start buildings on fire
https://www.bbc.com/news/uk-england-london-23930675

>>11951719
Well do you want to work with buildings or with machines?

>>11952164
https://www.theguardian.com/artanddesign/2013/sep/06/walkie-talkie-architect-predicted-reflection-sun-rays
>The developers have blamed the problem on "the current elevation of the sun in the sky," a position Viñoly seems inclined to share.
More evidence that the sun path suddenly drastically changed around 2013.

>>11944725
Aren't there concerns about cavitation?

>>11942817
And he used a hammer to forcibly get them into the slot and the hammer mark is visible on recovered wreckage on chassis of the gyro

>>11946372
You are what you import...

>https://en.wikipedia.org/wiki/Sverdlovsk_anthrax_leak

The produced anthrax culture had to be dried to produce a fine powder for use as an aerosol. Large filters over the exhaust pipes were the only barriers between the anthrax dust and the outside environment. On Friday, 30 March 1979 a technician removed a clogged filter while drying machines were temporarily turned off. He left a written notice, but his supervisor did not write this down in the logbook as he was supposed to do. The supervisor of the next shift did not find anything unusual in the logbook and turned the machines on.

>>11952164
I hate these fucking jewish glass tumors with all my heart
Who the fuck hasn't heard of a solar cooker or a parabolic mirror

>>11950952

>https://en.wikipedia.org/wiki/McDonnell_Douglas_DC-10#Cargo_door_problem_and_other_major_accidents

>>11934844
>Like, holy shit, does it really fucking matter if America's roads are collapsing
Yes.
As long as any blame or criticism is diverted from the CCP's address.
That's how they always do it

>>11937458
They were doing fine when engineers were still heading the company. Boeing was synonym for safety back then.
Now it's beancounters and marketeers that are on the top spot, who only care about making stockholders and investors happy

>>11941636
not the primary issue.

>>11933751
Na you right, we should definitely have more of these threads. Not only puts your responsibility in perspective, but hardy keks are never a bad idea

>>11933761
top kek

>>11933928
Fucking Christ. I wasn't yet done with my coffee either..


>>11934008
Kek, can confirm. How many times have I said "eh, it'll hold" without actually doing the math. Knock on wood that hasn't backfired yet, but yeah.. I should stop doing that

>>11940653
desu I'd say the Shuttle design as-engineered was still inherently unsafe by the standards of most rockets.
but you could equally counter that the root cause was still political/management incompetence. I mean even the Solid vs Liquid rocket booster thing came down to the budgeting office saying "nah, making them liquid will cost a few million, do solids."

>>11946286
That was very freaky, especially the end. Those poor people.

>>11942111

Oh God...

>>11933799

Why were the boosters divided into segments?

Wouldn't it make more sense to have a single, monocoque structure?

>>11957065
Gotta be small enough sections so they can be shipped back to the factory to be re ̶u̶s̶e̶d̶ furbished.

>>11943485
proof that asymmetry is always superior to symmetry.

>>11946286

Now THAT'S a FAIL!

>>11933751
https://en.wikipedia.org/wiki/De_la_Concorde_overpass_collapse

I used to pass on that bridge everyday to go to school

>>11935997
>https://en.wikipedia.org/wiki/Capacitor_plague
What are capacitors actually used for?

>>11949847
So that’s why my packages never get here

>>11933859
Khan Noonian Singh remembers. It is what caused him to become a tyrant and conquer asia.

>>11934203
Didn't they forget to do something with prestressed members?

>>11958923
>Interpreting a low quality image stitch job as evidence for anything but low quality image stitching

>>11958921
It's not that they forgot to tension the cables. It's that they DEstressed the cables after removing the shoring to try to deal with cracks.

>>11958923
Oh boy it's so bad that even that nearby building is wavy. Almost as if there's some sort of warp to the image.

>>11958923
I can do a more convincing job with the smudge tool on photoshop

>>11958923

That satellite should stop drinking alcohol.

>>11958740
High pass filtering, or more generally, storing a charge.

>>11958923
You'd have to be willfully retarded to believe the dam actually looks like that.

>>11938538
Reminds me of this: https://en.wikipedia.org/wiki/Dublin_whiskey_fire

>>11938148
It was sunk on purpose though.

>>11934047
"Architecture begins where engineering ends"

>>11938529
Kek

>>11945288
You forgot the carlos image that was supposed to go with your post

>>11960507
>None of the fatalities suffered during the fire were due to smoke inhalation, burns, or any other form of direct contact with the fire itself, but from alcohol poisoning after drinking from the 6-inch (15.24cm) deep river of whiskey

>>11958740
The XboxHUEG used them instead of a CMOS battery. If you have one and haven't replaced it, it's probably dead already.

>>11958923
Related?
https://en.wikipedia.org/wiki/Restrictions_on_geographic_data_in_China#GPS_shift_problem

>>11958740
high pass filters/DC blocking, low pass filters/transient decoupling, RC timing circuits.
Lot of use in power supplies

>>11933751

>>11934762

I'm gonna bet that some of the poor souls that jumped into the water to escape the inferno were picked off by opportunistic alligators.

>>11967146

Imagine being the employed who fudged the calculations and ruined a $100 million Mars mission.

>>11950286
I was reading about it on the wiki and the collapse apparently wasn't caused by resonance but "aeroelastic flutter".

>>11967146
>>11969168
Lockheed used some software that calculated forces exerted on the spacecraft in pound force and not Newtons like NASA requested and nobody caught it. So all the correction burns they did were off by a factor of ~4.4. Their calculated orbit around Mars kept getting lower and lower and they didn't know why. Some of the engineers wanting to do a burn to raise it, but NASA ignored them, because bureaucracy, and it burned up in the Martian atmosphere.
You'd think NASA would have learned their lesson about checking code, but fucked up again recently by not checking Boeing's shitty capsule code and the thing deorbited and nearly burned up.

>>11933928
>go and be an EMT they said
>youll save lives they said
itll be a while before i eat anything from satriale's

>>11941272
>goal is to prove we can get to the moon
>how dare they get to the moon
the reason moon missions dont happen anymore is because
a) not sustainable
b) not fruitful
also comparing aircraft to space travel is pretty damn dumb

>>11941272
the problem with NASA is congress and the GAO.
instead of having a serious strategy with a serious budget for NASA, congress is constantly looking for ways to fuck NASA and NASA is constantly looking for ways to lie to congress. if NASA comes out with a serious plan based on what they can do with their current budget, congress will go "great, now do it with half of that"
hell, the space shuttle was a bastard compromise that basically preserved manned spaceflight at the cost of a vehicle that was of highly limited use in every other respect. Congress wouldn't pay for the rockets, so why not try and rope them into having to pop up 7 astronauts with every TV Satellite? Congress won't pay for a proper new rocket program, so why not rope them into paying for a shuttle with some fanciful figures about how much cheaper it'll be in the long-run? and of course, then, congress won't even pay for a proper shuttle development, so however fanciful the original operating figures were, they're now completely worthless because congress wants to trade lower development costs now for higher operating costs later...

i'm not even fully on the side of NASA here - they don't need apollo levels of funding and for their every fantasy to be indulged. All they need is long-term guarantees on their funding so that they know what they're working with, rather than having to spend all their time playing politics with a congress that sees them as nothing more than fodder for easy budget cuts, something that can be bullied into pork-barrelling their districts, etc.

>>11933751
>deadliest building collapse excluding the World Trade Center attacks
What about pic related?
Wasn't that partially caused by a collapse like with 9/11?

>>11967146
You mean use US customary or that happens.

>>11934783
I wonder, when it goes, how they'll try to cover it up.

>>11934844
Give them a break, whataboutism is all they have.

>>11942817
>>11952284
And later the builder escaped back to the US where he originally came from.

https://en.wikipedia.org/wiki/Katowice_Trade_Hall_roof_collapse

>>11958923
That image is retarded, but recently the runners of that thing admitted it was fucked.

>>11969957
>The trade hall was hosting the 56th National Exhibition of Carrier Pigeons, with over 120 exhibitors from all over Europe.

https://en.wikipedia.org/wiki/Sampoong_Department_Store_collapse
depending on whether or not you count the chairman of the building hacking up his own blueprints as "engineering" or not

>>11943576
It's amazing what the Romans were capable of. Imagine if they had pulled off that Corinth canal.

I like how we're building prefabs with polystyrene.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2430229/
That material, along with fibre glass, are going to be health hazards.


Speaking of fibreglass, info on fibreglass is being cracked down upon and this is starting to remind me of of the asbestos cover up.

>>11937237
>>11938267
That's actually the disinfo, there are pics on site of it and it's got problems, clearly.

>>11945009
they always say shit like that, don't take it too personal.

Is this thread being slid?

>>11953774
Is that the dallas ft. worth area?

>https://en.wikipedia.org/wiki/Norwegian_rocket_incident

Remember that time when Norway almost accidentally started WW3?

>>11971293

What the fuck.

This was the day I was born.

>>11934711
anon no pls

>>11939494

Linky or you stinky

>>11951570
just do a second degree in a different minor unless your a americuck

>>11971293

>only time in history any nation's nuclear briefcase was opened for any reason

Yikes.

>>11944756
>brass bolts used on critical applications
holy shit what the fuck?

>>11944798
The force on the bolts was literally doubled due to the construction fuckup and even then it only failed at max capacity.

>>11976454
The resident engineer on the construction site would make design changes on the fly like that. It's still an engineering decision.

https://en.wikipedia.org/wiki/Intelsat_708

>haha silly Americans fitting their rockets with self-destruct functions
>why would you destroy your expensive payload just to protect people on the ground?
>what are the odds of a sophisticated launch vehicle suddenly yeeting itself into a populated area?
>right...?

>>11974431
>unless your a americuck
that's what I am.

Probably not know outside of sweden but https://en.m.wikipedia.org/wiki/Hallands%C3%A5s_Tunnel

one of the most expensive infrastructure projects in sweden that was fucked up several tines. Its now completed and the traveltime from malmö to gothenburg is now six minutes shorter

>>11934783
Anyone who mentions it will be out in a camp and over the intercom will be
>THE THREE GORGES DAM IS NOT REAL
>THE THREE GORGES DAM WAS NEVER REAL
>AND IF IT WAS, AMERICAN ENGINEERS SABOTAGED IT

>>11974003
https://en.wikipedia.org/wiki/2009_Sayano-Shushenskaya_power_station_accident
>During this time, the level of vibration was very high, and was also registered by seismic instruments in the plant. During attempts to shut it down, the rotor inside the turbine was pushed up, which in turn created pressure pushing up on the turbine cover, which was kept in place by 80 bolts, each 8 cm in diameter.

>During the morning of 17 August 2009, 50 people were gathered around turbine 2. As the plant general director, Nikolai Nevolko, was celebrating his anniversary, early in the morning he went to Abakan to greet the arriving guests, and none of the workers present wanted, or had the authority, to make decisions about further actions regarding the turbine. It seems they were used to the high levels of vibration.[4]
haha dont worry bro its normal

>>11934869
It looks like MCM was responsible for building the bridge, and some of the biggest mistakes were from deviating from plans while building.

One big one (rumored) was a last minute plan change. The main span was built in one piece next to the road, and meant to be rotated into place over the road in a single night. It turned out that the piece could not be rotated as described in the plans and the engineers supervising construction (I assume MCM) made an on the spot decision to rotate it with a critical support moved a considerable distance away from where it should have been, and without reinforcements to the neighboring support to distribute the load. Another critical mistake was the tensioning of the rebar-- another on-site mistake.

>>11977190

>entire town flattened by blast
>only 5 fatalities

Riiight. China totally wouldn't fudge the body count to make themselves look better.

>>11969258
>Some of the engineers wanting to do a burn to raise it
could they have salvaged the mission if they ignore high command and did that anyway?

>>11979016
Of course. They needed to be a minimum of 80 km above the martian surface to avoid burning up and they came in about 60. I'm not sure those guys could upload commands to the spacecraft themselves, but it's probably not worth their jobs if they're wrong.

>>11977713
>new construction team fucks up and poisons the surrounding area with acrylamide
>not only still in business but is the 5th largest construction company in the world.
Chinese tier.

>>11970016
>The completed building was a flat-slab structure without crossbeams or a steel skeleton, which effectively meant that there was no way to transfer the load across the floors. To maximise the floor space, Lee Joon ordered the floor columns to be reduced to be 60 cm (24 in) thick, instead of the minimum of 80 cm (31 in) in the original blueprint that was required for the building to stand safely, and the columns were spaced 36 feet (11 m) apart to maximize retail space, a decision that meant that there was more load on each column than there would have been if the columns were closer together.[3]

>In addition, the store's three 15 tonne air conditioning units were also installed on the roof, creating a 45-tonne (50-ton) load that was four times the design limit. In 1993, the air conditioning units were dragged across the delicate roof, resulting in cracking.[6] The units were moved over column 5E, where the most visible cracks in the floor of the fifth level were seen before the collapse. The cracks in the columns worsened because the columns supporting the fifth floor were not aligned with the ones supporting lower floors, causing the load of the fifth floor to be transferred through the slab.[3][4]

lmao BASED korea

>>11979063
isnt the delay like 20 minutes? by the time they worry about it burning up it would have already right?

>the assumptions made in determining the revised wind loading were inadequate, in that they assumed all windows were closed. However, if the glass in a window had broken, or somebody had gone out leaving a window open, a wall panel could suffer pressure on one side and suction on the other, to an extent that the panels on the upper levels of the building might still be sucked out
>construction defects (failure to build as designed) had left unfilled gaps between floors and walls throughout, hidden only by skirting boards and ceiling paper, which left the building without fire separation (or acoustic separation) between flats. Tall blocks of flats in the UK are permitted relatively narrow staircases because the requirement for full fire separation between floors means that in theory, it is safer for people above the fire to stay in their flats rather than walk down the stairs. (This theory does not hold where the fire separation fails, as happened in the Grenfell Tower fire). Without fire separation it would be necessary for all people above a fire to escape, which would not be possible using the existing narrow staircases.
>further construction defects had led to the whole weight supported by each wall panel being supported by the panel beneath by two steel rods, instead of being spread evenly along the panel, leading to extremely high stresses that the concrete was not designed to withstand
the strengthening brackets which had been fitted during the rebuilding were in many cases not properly attached, since they were fastened to hollow-core slabs, and in many cases they had been bolted only to the thin concrete surrounding the cores, which was inadequate to take the stress.[7]
lol

>>11978306
Watch the NTSB report you're wrong about most things in this post.

>>11977263
do you have any job prospects in your field at all
if yes i guess just do that and save enough money to fund yourself
if no unless a masters is guaranteed to get you a job however there are country that offer free Tertiary education to foreigners you may have to learn the language however

>>11979342
* if no unless a masters is guaranteed to get you a job dont go for it

>>11969232
which means wind-induced vibration
which happens to match the resonance freq so the bridge got btfo

>>11979342
I had a few interviews right after graduation, but none of them came to anything. My job hunt has pretty much completely dried up since then, ie. submit application or resume and get immediately ghosted.

>>11944772
If the design isn't failsafe, then it's a bad design. A nuclear plant should be able to withstand incompetent operators.

>>11978306
The NTSB states in the video >>11934813 at 1:52:00 that "there was no damage" during the move and that "conditions after the move were identical to its initial state."

The only construction mistake that they talk about in the video was that the cold joint in the concrete at the failure location was not roughed significantly to 0.25". The construction documents don't specify it even though LRFD does require it. They also state multiple times in the video that the bridge would have failed even with the this joint sufficiently roughed.

The cause of the failure was the under design of the nodes. Figg made a mistake and underestimated the horizontal shear at the nodes when they analyzed the structure under simple span. They then used these underestimated values to design the bridge. Weirdly, they got the correct values that match the numbers FHWA evaluated post accident when they analyzed the bridge in its finished condition and didn't notice that the values were off by like a factor of 2.

The post tensioning of the tendon in member 11 created more horizontal shear on the under designed node and initiated the collapse. Figg was trying to close up the significant cracking observed in node 11/12 after the bridge had been moved. They also stupidly had a bunch of pipes around and in this node which further weakened the connection to shear.

>>11979125
It was like a day before.
>>11979444
I'm not some expert on wind loads, but am just reading the wiki. This video does a pretty good explaining the difference between the two forces. I will admit that the argument seems pedantic.
https://www.youtube.com/watch?v=mXTSnZgrfxM&vl=en

>>11971293

Yikes.

That was a close one.

>>11933875
what caused this?

>>11982344

the building had a stroke

>>11982344
it fell

>>11982344
The front fell off.

>>11982344
building got tired

>>11982344
gravity

>>11967146
Reminds me of ship Wasa from sweden. Aside of major design fuck ups the builders used inch rulers made in sweden and Russia. Russian inch was longer.

>>11935919

Why are we still using toxic hyperolic fuels for anything other than missles?

>>11982344

Botox wore off

Anyone got a webm of the Minneapolis bridge collapse? It wasn't so much of a engineering fault as much as poor maintenance.
https://en.wikipedia.org/wiki/I-35W_Mississippi_River_bridge

>>11985734
No, they fucked up and under designed the gusset plates causing them to buckle when they put all that construction equipment and sand on the bridge plus additional resurfacing over the years. Maybe you should read your source before spouting off bullshit.

https://en.wikipedia.org/wiki/Hubble_Space_Telescope#Flawed_mirror

>>11938426
To be fair, they did launch the STS 135 times with only two total losses. For a system that massive with as many foibles and known issues as the shuttle had that's actually pretty impressive.

>>11971293
>Norway started