How Do Engineers Build Safe Bridges? | Built From Disaster | Spark

[@CessnaPilot99]

It would be nice if they put the date the documentary was produced in the description. This documentary is over 10 years old

[@mayafarr7590]

They did in the description

[@antoniomarini7563]

no it isnt

[@13minutestomidnight]

Sure, it would be better if the uploader mentioned the date. You likely wouldn't get any different engineering information if it was made more recently though (it's pretty much general principles).

[@pfeilspitze]

Yeah, the Stonecutters Bridge opened over a decade ago. Free Hong Kong!

[@radudeATL]

Yah.

[@DIMM4_]

2:52 THERE HE IS!!!!! THE SUEZ CANAL BOAT!!!!!!!!!

[@cgi2002]

That ship actually has a noteworthy presence here. They did studies on a 155000 ton ship hitting the bank at 6 knots. Little Suez boy was 400000 tons, and it wasn't carrying an excessive load. Their testing was massively insufficient.

[@Aldrinkun]

"when completed in 2009" Man i often forget how old these YT documentaries can be

[@antoniomarini7563]

my sister was born in 2oo9

[@13minutestomidnight]

Why does it matter? It's not like they're any less interesting, just increasingly less relevant (20 years ago might make a considerable difference in content or mark a drop in quality?). Not sure there's a point as long as you avoid re-watching something, but there's no point in twitter either, so clearly I'm avoiding a lot of common-ground understanding here...

[@Aldrinkun]

@@13minutestomidnight if it matters or not thats not for me to decide, everyone can decide by themselves. I meant what i said, i did forget how old these can be, doesnt mean they are less interresting :p

[@gracemiller5792]

Watching someone be interviewed only to have the celebrity evergreen float past in the background is hilarious 35:18

[@popularairtravel2905]

Great video, friend! There are times when nothing better illuminates your path than a burning bridge. Enjoy your travels and good mood!

[@mathuringarcier]

Very informative documentary! All events are set in a great order which made me watch even the credits! Great job!

[@nowankersallowed2115]

I spoke about how I enjoyed things like this.. wondering how they actually built over water etc

[@boogiestreet594]

8:15 look at the left ankle of the person lying next to her... i don't think ankles are supposed to bend that way are they?

[@connorbopha]

Omg

[@boogiestreet594]

@@connorbopha LOL i forgot i wrote that

[@buzzyes7335]

Although the Tacoma bridge was not that great at resisting the strong winds, one of thr major parts involved which caused it to fall was the resonant frequency of some components of the bridge. When the wind wss able to oscilate the bridge with verryyy small oscillations, it was able to reach the resonant frequency of some components of the bridge, meaning that those small vibrations turned into massive vibrations due to superposition. THAT I believe, and many others believe, is the reason why that bridge collapsed.

[@Powerranger-le4up]

That was the same vibrations that tore apart Partnair Flight 394 which became worse due to a broken APU and three counterfeit aircraft bolts in the tail.

[@thesage1096]

41:34 lmaooooo ma boi felt attacked

[@whofandb]

The replacement 35W bridge was completed in a year. I will admit that driving over the replacement bridge did have me hold my breathe the first time.

[@djijspeakerguy4628]

Did someone say, box girders? In Seattle, we have a very similar bridge, the west Seattle bridge, that uses box girders and similar post tensioning cables, and the structure is cracking. It will take until 2022 to fix it.

[@samiralhasan1640]

FIGG Bridge Engineers is the same company that designed FIU pedestrian bridge that collapsed last year in Miami lol, RIP.

[@zxbigmikexz]

Paused as soon as I noticed the name on his vest. Pretty sure they've lost several contracts since, due, in part, to the FIU disaster. At the least, one in Texas.

[@lscanlan1]

I was watching the tall and long bridge quite a beautiful bridge , whoever designed it was claps down, as nowadays so many experience expert engineer, good on the design, but fail on not aware of the strengthening materials using, that my comment.

[@malachimuhammad-dy2ow]

Does it have the Galloping Bertie in it?

[@richarddearmond8772]

At any time of the day or night, I feel safer driving over a bridge than driving through an under water tunnel. This is very true for me in earthquake prone areas.

[@jentapsell1137]

I would be interested to know how they have increased safety of bridges around earthquakes

[@shrapnelslurpee]

I seen the bridge in Minneapolis collapse in my dad's rearview mirror.

[@braydons5623]

My grandfather was tour bus driver back in the 80's and had just cleared the Sunshine Skyway not even 5minutes before the boat struck.

[@GH-oi2jf]

The interesting question is why structures fail. The I35W bridge failure in Minneapolis wasn’t a consequence of lack of knowledge, because steel truss bridges have been built for a long time. It was just underengineered. It came down, as it often does, to an inadequate margin of safety. Doing things on the cheap.

[@13minutestomidnight]

Maybe that contributed, but clearly another big contributing factor was that there wasn't enough government-funding for the department that carried out maintenance on the bridges. Whether the bridge was under-engineered or not, the maintenance department had been saying that they did not have enough people and that many bridges were in desperate need of maintenance they couldn't provide, and nothing was done about it. I agree that doing things on the cheap is a big problem in construction (particularly when the customer won't pay for the necessary safety precautions or the people in charge of building it cut corners), but I'd be more concerned about the government paying for a brand new shiny bridge when it is under public scrutiny, and then cutting maintenance costs when no one is looking.

[@aysty5951]

“Nowe” omfg 😂

[@usmale4915]

Very interesting and informative video. Thank you for the upload.

[@satyrn3748]

I would have made her better if I was alive back then. My grandparents were very Young when the bridge collapsed, so they would have not remembered it. I celebrate July 1st every year.

[@malachimuhammad-dy2ow]

25:28 Galloping Gertie.

[@trumanhw]

First she says she can't believe it collapsed ... but then she admitted it "didn't look right" ..? I've avoided many things I thought others were stupid to trust.

[@KatyLawson]

Sometimes you think things aren't quite right but you choose to trust them anyway because we're not qualified to know if they're absolutely disastrous or not. For us, it's just a weird bridge quirk.

[@GH-oi2jf]

The statement by Prof. Galambos is odd, because other structural engineers have said they knew the World Trade Center would collapse. Steel loses its strength when heated sufficiently. The I-35W bridge was just underdesigned, particularly the gusset plates.

[@ZunarZulfiqar]

No other steel structure, like the World Trade Centers, has ever collapsed due to fire. The collapse of the building was also identical to how a building is collapsed by explosive demolition. Although it wasn't the same plane, the structure was strong enough to stand an impact from a 707 aircraft. There was no way the fire weakened all the steel in the entire building.

[@Markle2k]

Many people who now understand why were surprised when it happened. They weren't considering the insulation being shot peened off the steel by the remains of the plane, for example.

[@AD-hq2uz]

@@Markle2k and the higher heat provided by jet fuel.

[@kristinessTX]

this is so fascinating.

[@titanicseaturtle3808]

What normal people think of built from disaster: oh it was build from something that was involved in a disaster. What I think of built from disaster:

[@jentapsell1137]

Designed to be disaster proof? This comment scares me they said the same this about the titanic. The sad truth is in most of these documentaries a pattern is evolving ..bigger better faster. The higher the population the more pressure for improvement and the higher the fatalities when it goes wrong. It is incredibly interesting to learn the history and how they aim to fix and improve but the self assurance scares me. While human error, profit and time schedules are factors there will always a risk and to assert that disaster can’t happen is incredibly dangerous in my opinion .what I would like to know is how they would deal with it when disaster did happen to ensure fatalities were minimal because to the unexpected is part of life. Good series though lol

[@nou-jn6uz]

sees that bridge isn't looking right bridge: collapses **surprised pikachu face**

[@satyrn3748]

Gertie is now 83 years old! 😄

[@goatrazziroom]

Fabulous💗💕

[@prometheusunbound7628]

"Disaster proof." Man, it's like taking a sharp stick and poking Fate in the ass.

[@fewgrain4245]

The Zhuhai brodge fron Hong Kong to Macau

[@aoclive6710]

China virus

[@baronvonlimbourgh1716]

Yet another very good reason to stay way clear of the USA..

[@erichvonmanstein6876]

Yes, please stay away we have enough idiots we dont need you as well

[@chuckking4188]

The guy who was responsible for the worst of the whole thing is the one who should have been sent to the core to the radioactive water 💧

[@Mikeandsue42508]

Last year a bridge in Burlington Washington collapsed

[@Theyoufeelme]

I hope it last longer then 120 years

[@justandy333]

And yet bridges are still collapsing around the world. The Morandi Bridge in Genoa Italy claimed a further 43 lives.

[@mboz_2108]

Yeah, this documentary's so-called safety protocols really don't mean anything.

[@RonPiggott]

29:06 - Anyone catch the port-a-potty at the top of the tower?

[@josephaltman460]

It's a Penthouse Potty!

[@canto_v12]

Would have been perfect for storm season. Alas, per another documentary, the towers were completed before the first hurricane of that year arrived.

[@kwokmanlam6836]

The new Oakland Bay bridge was built by Chinese.The American engineers just watched and inspected in the process.......A Chinese welder working,three Americans inspecting ! LOL.

[@kylevogelgesang9996]

You are alive cuz PEOPLE SAVED YOU.

[@joelarnold2394]

This bitch pissed me off so bad lol

[@thesage1096]

33:33 ever charming.

[@juliestevens6931]

Earthquakes were never mentioned. I guess Hong Kong doesn't have them, so no need to anticipate problems?

[@HungHeiLong]

There is no earthquake in Hong Kong

[@canto_v12]

Hong Kong is not in a seismic zone, but it is in a hurricane/typhoon zone. The threat is different, but both require mitigation measures in design and engineering.

[@homerbosserman8484]

Excessive witness talking.. none of the witnesses had anything to say that was structurally relevant about the bridge failure.

[@TheLT52]

They weren't chosen based on their profession. Jeeze, you aren't an engineer yourself.

[@JustinColman-kz5fl]

What?

[@robertvalderaz7329]

Safety and integrity of any structure is only as good as 5he money holds out. Once delays, unforeseen problems arise, short cuts take hold to keep the project on time. I am an Ironworker with 43 years experience. Often the engineer will ask me what do you think. Engineers need to spend at least 2 years in the field before being certified. Because what works on paper is not worth shit in the real world.

[@saxopio6280]

The narrator's accent though.

[@farmguy2400]

@@msw7021 it's shit, in typical English word pronunciation there are plenty of words mispronounced.

[@themourning1783]

Great story and I feel for you but unless you have some kinda paranormal gravity anomaly cars don't suspend in the air. When what is supporting them falls, they fall to. You may want read up on physics. And although people mistake Einstein for the discoverer of gravity he has some interesting insight on it. I'm pretty sure the first person that tripped discovered gravity.

[@Markle2k]

The deck was whipped down by the other sections that had fallen before it.

[@TheWolf133]

The enemy is building a bridge!!!!!! Oh wait wrong video

[@mattstone877]

he cant really say tower

[@neilhuband995]

eh, the Tay bridge disaster, ken

[@mazenmady1136]

knuckles zedawg this documentary is 10 years old

[@connorbopha]

Hi

[@fewgrain4245]

The Tay bridge Disaster.

[@rajeshjoshi4922]

Hindi comentry

[@tomekapompey563]

Love woodworking? Try woodprix.

[@pvnnewman]

Is this a final destination 🙈🙊💔

[@trumanhw]

*Engineers DON'T build maximally RELIABLE or DURABLE bridges.* *They build bridges that're BARELY able to withstand a stated tolerance.*

[@annettezaleski]

No regulations at the times of many bridges and buildings built bc ppl only want, and do, build things when there's a bigger profit to be had...that's going to be during the times that Republican Presidents, who ALWAYS deregulate on building construction and engineering projects are done...it's pathetic and murder of ppl who will eventually die bc of the ability to use the cheapest materials and use the cheapest bids on the design engineers! "America (Houston), we have a problem!"

[@cliffwoodbury5319]

40 second in was a great actin job - then 2 minutes in. I hope there getting acting and engineering checks. Now i see why these bridges are falling. Hollywoods building them.

[@donreichdedios9064]

hehe.. east pa rin

[@connorbopha]

Lol

[@garym8348]

Noi. Right Noi. Something English Noi. Lol some of you will get this joke.

[@giocaconmesottolacattedral1810]

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[@giocaconmesottolacattedral1810]

Conclusão : BRAVO GOVERNADOR ROMAIN , A CIDADE MARAVILHOSA , é O CAMINHO PERFEITO DE QUEM NASCE OU SE VINCULA COMPACTUA COM AS 6MADALENAS PROSTITUTAS . ou seja ; POIS DESDE O PRINCIPIO da CRIAÇÃO , MULHER SEMPRE FOI E SEMPRE SERÁ APENAS UM OBJETO DESCARTAVEL QUE JA VEM AO MUNDO COM O UTERO DO PECADO ,SEM PODER E SEM GLORIA , FAZ IDEIA PROSTITUTAS , DE PUTAdas METAMORFAS DE HOMEM QUERER GOVERNAR O MUNDO DO BU$INE$$ . hahahahahahahahahahahahahahahahaha !

[@Rukky98]

Why did will smith bring me here 😭

[@mvrckisk97_39]

Haha

[@denzelgregoire913]

The far group fourthly surprise because ease july owe circa a lumpy fruit. ill-fated, uncovered process

[@amairanavedo9247]

The tidy dietician enzymatically jam because diaphragm peroperativly soak past a absorbed maid. healthy, round forgery

[@willjones7132]

Once you know how half azz and delicately balanced every part of out society is you will be shocked that bridge collapse is not more common. Do you want bridges, buildings, and infrastructure built by the best people for the job, or the best people to make HR look PC? No matter how much money you throw at a project if the people working said project suck at their jobs it's not going to be done right, but how does someone who sucks at their job get a job you ask, simple, small minded HR departments and hiring practices, that are not out to find the best people for the job, but for finding people to make HR look PC. Hiring and paying an unskilled untrained worker higher wages does not make them skilled and trained.

[@13minutestomidnight]

It's rarely about the "best people", it's about the government providing the funding that there are enough people with enough working hours to perform maintenance. No matter how good you are at your job, you can't work 24/7 (which is why not enough doctors and nurses in a hospital leads to people dying from no treatment or substandard care). Basically, the people maintaining these bridges (the transport authority I think) had been telling the higher-level government that they didn't have enough people or funding to maintain the bridges, and top-level government didn't give a flying fuck until the bridge collapsed.

[@jc9285]

Put man on left woman on right then bridge is made :)

[@jamesdeane6052]

It's not French engeriing! It's British engering! Please get your facts right lol

[@KyrilPG]

Nope, it's French engineering. The British architect (Norman Foster) only applied its design onto an engineering work, not the other way around. The engineer (Michel Virlogeux) was the same as the Normandy bridge and he proposed a type of bridge that was chosen. Then the architect (Foster) worked with engineer (Virlogeux) to apply the architectural "statement" to the engineering work. Whatever architect would have been chosen, the bridge would have been really similar as the architectural design was based on the engineering design of Virlogeux. It's quite common nowadays in France to split architectural and engineering design to maximize safety. The engineer(s) always gets the first and last word about the design.

[@jamesbond1231]

*disoriented. Do you orientate yourself?

[@canto_v12]

Regional usage

[@jamesbond1231]

@@canto_v12 what is "orientate" ? Irregardless of region, it's not a word.

[@MichaelTrxn]

You know Lindsey is lying because she keeps looking off and is thinking of what to say. That’s two of the traits of lisrs

[@natesnautical]

America: How to build the most ugly, and biggest concrete monster. Yeah it is safe, but it is hardly beautiful or striking...typical American approach to everything.

[@daryljonesfoster4102]

Yes we do vaul life more than others !

[@canto_v12]

@@daryljonesfoster4102 Only the replacement I-35 bridge was designed to value life. Hopefully.

[@OGKujoh]

this sucks

[@nou-jn6uz]

sees that bridge isn't looking right bridge: collapses **surprised pikachu face**