How Safe Are Modern Structures? - Massive Engineering Mistakes - Engineering Documentary

Massive Engineering Mistakes - S03 E06
Dive into catastrophic engineering failures from the New Orleans Collapse to the Houston Bridge Failure. Witness how small errors can lead to monumental disasters. Join us for a gripping exploration of history's most shocking structural failures.
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Massive Engineering Mistakes is a riveting series that explores the daunting realm of architectural blunders and engineering catastrophes. From gravity-defying towers on the brink of collapse to bridges built upside-down and airports slowly sinking into the sea, these ambitious missteps redefine the boundaries of scientific innovation. Yet amidst chaos, the genius of human ingenuity shines, crafting solutions as awe-inspiring as the disasters themselves. Unveiling the precarious balance between triumph and failure, this show offers a thrilling journey into the world of spectacular engineering errors and their extraordinary rectifications.
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[@TheBodrey]

re: NOLA hotel collapse - The decision to remove the shoring after only 8 days and move it to the next floor likely contributed to the collapse. This was almost certainly done in an attempt to speed up the project's completion (in order for the builders to save money, of course). Of course, there may have been other factors that contributed to the collapse (design/engineering flaws). In any event, whomever was responsible for cutting corners in order to build the hotel faster should be in prison.

[@k53847]

IIRC, the other element was that FIGG was involved in the design and the FIU disaster caused some serious questions about their design competence.

[@RonFilco.9358]

You'd think that the word "professional" would mean the utmost pertaining to projects like this

[@reggiebenes2916]

I had my 13 year old daughter watch this, and even she saw that the corners of the notches would be a weak point. BTW, she's not a structural engineer, she's a 13 year old girl, with two eyes, a brain, and common sense.

[@novascotiawoods_goproryan]

and i agree 100% with that, and mind you i worked in the field for awhile as well the strength of the cement matters with the steal bar's

[@randymclean9121]

The glue may have been strong, but the woods strength is not so strong. This design was very amateur.

[@thomaslink2685]

@@novascotiawoods_goproryanI was a mechanical engineer, and I believe that civil engineering projects must have a Professional Engineer sign off on the design. So I don’t know how this could have happened.

[@thomaslink2685]

Kudos to your daughter! What she spotted is not so obvious to most. Encourage her to become an engineer.

[@carlsaganlives6086]

The same outfit/conglomerate making big multimillion dollar mistakes has been forced to halt construction on another major bridge right down the coast in Corpus Christi, after flaws so extreme were discovered there's serious talk of tearing the damn thing down and starting over...

[@Floydian4everr]

I heard. It's about time that cronys and big kickbacks don't win over morals and putting taxpayers first before the 'ol boy network and who knows, they may have made changes after the Florida incident and the tx project may have been fine but bringing in a completely new team with zero dogs in the race for the original design and engineering.

[@kayakjim007]

This really looks like some excessive settlement issues turned up during initial construction that precipitated further investigation into how that would affect the rest of the build. The dialog for this video lacks the details to properly portray what happened.

[@ronobrien7187]

The tension load on the Raliegh bridge members was moved upward in the modulus, which increases the tension load exponentially.

[@williesnyder2899]

A “charpy” is a stress magnifier, and someone surely failed to adequately calculate the resulting loads… Yes, only a matter of when that strain would crack the material, propagate and collapse the structure…

[@Bobrogers99]

An independent study of a bridge design should be done before construction begins. When "innovative" elements are used in the design, someone should ask if tried-and-true systems would work as well or better. And as we've seen in some recent high-rise buildings, the foundations are crucial and should not be subject to cost-cutting.

[@VladKirshkov]

What they left out was that the independent study was commissioned because the engineering firm in charge of design had another bridge collapse during its construction. Investigation showed there were pretty obvious signs the bridge was about to fail due to its design and the engineers and construction company just ignored them and pushed on, which meant there was traffic on the road under the bridge and construction workers on top of the bridge when it fell down. Several people were injured or died. The engineers lost their licenses and all the projects they were a part of had to be re-examined. Search for 'FIU Bridge Collapse' if you want to learn more - Brick Immortar's video about it is good.

[@edlinke2368]

do they not have inspectors in that state or r they paid off under the table

[@joblo341]

Huston still has a problem. That design company has stolen their money, and still is in business, threatening other people with defective designs. One thing I hate about this of program is you identify problems, but rarely define the fixes.

[@yutubl]

One theoretical alternative to a risky bridge may be a tunnel if you have access to experience tunnel building companies. Project management (PM) defines a so called project triangle with 3 sides (time, costs, quality), pulling 1 side changes 1 or 2 sides: e.g. too much time pressure leads a) to less quality (when holding constant costs) or to higher costs (when holding constant quality) or c) both less quality and higher costs. Risk categories: 1. plan/design/calculation: not enough safety reserve (overload, duration) especially when first project of that kind, 2. material/resources/parts/component risks: incoming, processed and output material should be checked for fitting quality, 3. process = peoples work step risks: not the best process steps, lack of high quality tools, 4. quality control: continuous measurement and improvement of each sub-process: input material/resources/parts/components, processing steps and output results, questioning for best peoples work steps with directly QA feedback (e.g. like proof tool with preselected torque).

[@katiedrew4708]

Watching video after video of these human error disasters I'm not looking forward to the bypass I heard was to be built in Castroville, TX.

[@earthwizz]

In New Orleans cowboy construction with a breath-taking lack of oversight. Tofu building at its best, the dollar rules.

[@amyjojinkerson-b6o]

only as strong as it's weakest link

[@kevinquist]

the 'engineers' should have known better. with out reinforcing those notches. that bridge lost about 50% of its strength. hell most home framers would have looked at that and said. no.

[@howardsimpson489]

Since wind turbines yaw (angle to the wind) is adjusted by the motors that rotate the whole nacelle on the tower, why was it not turned out of the wind? Side on, the blades could have ceased to rotate completely. Why did none of your engineers even mention this?

[@DD-wd7ku]

Isn't this the system used in aircraft propellers? How come it took so long to use a working existing design?

[@carlsaganlives6086]

They're always open to new ideas, drop them a line.

[@TheMrFarkle]

The word "mafia" immediately comes to mind.

[@graham2631]

Ya, capitalism mafia. Profit at any cost, don't get offended, it's just business.

[@Floydian4everr]

?

[@Jaysqualityparts]

Things last 1000 years and then engineers showed up along with corruption. It was better when they over engineered buildings not right at the limits of failure.

[@flashgordon3715]

Don't forget computers. Computers didn't make stronger bridges, it made bridges cheaper to build.

[@alayneperrott9693]

Roman engineers - note the word! - built astonishing bridges, aqueducts and churches, some of which are still standing after ~2000 years.. But they were working for the glory of Rome and its legions, not for profit-making corporations, or in some countries like China, for a pittance paid by the state. The Romans also devised very sturdy structures and building materials, such as concrete that set underwater or contained pumice to make it light enough to build large, unsupported domes. Modern "experimental" building materials and techniques are often flimsy and employed without sufficient testing or inspection, primarily to save time and money.

[@ImaDragonRawrrr]

I can’t speak for all engineers, but we still over design our bridges here in the UK. We have quite big factors of safety and our structures are generally very good. It’s too specialist and expensive to construct bridges like they used to (for example arches) but we still have safe structures.

[@carlsaganlives6086]

@@flashgordon3715 The pork barrel needs to kept full, item #1...

[@dont_listen_to_Albo]

The notch at both ends of “simply supported” beams, as is the case here, is not uncommon. Such “simply supported” beams experience zero vertical shear stress at its ends, and hence do not require the full depth at mid-span. However, the timber beams have an inherent weakness, longitudinal-wise. (It’s easier to split timber lengthwise than crosswise.) The vertical shear is higher within the middle of the beam (maximum at mid-span), which induce equivalent horizontal shear, causing the longitudinal split along the timber beams as seen in the video.

[@kevinquist]

"the bridge collapsed. we could tell something was wrong....." gee. ya think? and this is a college? wow.

[@Kevin-p2g4g]

😂😂😂😂

[@opengnosis8555]

It looks really bad for a trade or tech school to design and install, engineering fails.. Basically.. If that tech school represents U.S. infrastructure.. I know now why we are.. "Done"

[@propellerhead2000]

Fortunately Wake Technical Community College doesn't represent US infrastructure engineering. Seriously, a moron could see that design flaw. All they had to do was engineer steel carriers for the notched ends.

[@wellcomematt]

So who cut the notches??

[@pazsion]

didnt follow directions and kept the bridge in transport mode. then going against their word, and used materials like concrete in a forrest... should have used recycled long boards or real wood... and dont build bridges to no where!!

[@ronobrien7187]

The wind turbine blades failed due to inertial forces.

[@sharonwhiteley6510]

I wish someone with common sense would review Corridor H under construction in parts of WV. It's headed toward catastrophic accidents just from weather and the access ramps. The first things that freeze up in winter are BRIDGES. They are building long bridges across ravines/valleys/rivers. Access ramps with a 10% grade. One Bridge had to be worked on before the steel deck put in place because the pilings moved 4-6" !!!! Our once beautiful county now looks like a war zone. I will ABSOLUTELY refuse to travel this new route. I will stay with the older route built on the ground. Between the war zone, demolishing thousands of acres of state and national forest, destruction of wildlife habitats and the idiotic wind turbines, they are absolutely ruining the beauty of the area. How many people will visit to watch wind turbines instead of the fall colors of the trees?

[@williesnyder2899]

In matters of marriage or materials, don’t settle… Houses and husbands, brides and bridges… Foundations, compression, tension, torque, shear, delamination and de-coupling… “Measure twice and cut once!”

[@jeffreydeeds9225]

What's with the sound of breaking glass when the concrete and steel is crumbling?!

[@GeorgeRuffner-iy7bm]

For the kind of money "designers" are getting I submit that I'm ready to go into business ASAP. LOL 😉💩

[@reneesimerale]

You would think by now WE would know how to build a f-ucking bridge by now!

[@RenanDavidSoriaAhumada]

8:35 its nice to see youre switching to the metric system

[@kerryphillips7508]

No body is switching. They just use in this story because it’s told by a British person

[@janhansen554]

Norway tried to build brigdes in wood and steel. First in the world we heard. Not surprices, two brigdes is now destroyed by nature of 13.... They have lasted less than 15 year..No wonder why rest of the world havent tried same stupid design

[@hmgc-slhq137]

Not surprised, the world's education system went to pieces since the 90's. Don't expect it to get better either.

[@CamCrazy5-92]

Although no one wants it, it still happens unexpectedly. No one knows in advance.

[@amyjojinkerson-b6o]

governer failure

[@herculydia]

Hi Norma Jean

[@johnhenrick2298]

Yet another video ruined by adding music to speech. I want to listen to what's being said, not have it drowned out with piano music and drums. Why do video editors do this? I'm not the only one to mention this. Others have complained on other videos. We don't need to be entertained with obnoxious music at all.

[@itsianwood]

'Bridge Build Go Terribly Wrong' on the thumbnail. You may want to fix that - just a heads-up.

[@HaleiwaGirl808]

What exactly is wrong with it

[@itsianwood]

@@HaleiwaGirl808 It's obviously a typo. It should be 'Bridge Builds Go...' or 'Bridge Build Goes...'.

[@hazardtriplezero]

@@itsianwood or gone

[@itsianwood]

@@hazardtriplezero yeah!

[@petergerdes1094]

I mean the typo is why I clicked.

[@matdur2000]

Why do all the "experts" look like unemployed actors and sound like they're reading a script?

[@livvydunham]

narrator is obnoxious

[@mandywalkden-brown7250]

This was so dumbed as to be pretty pointless. No details on fixing, journalists have no expertise, what the heck were they even included for. I should have just given up early on but was hoping it might improve. It didn’t.

[@mafiapanda]

first lol

[@OHLeftyKnifeGuy]

Congratulations on your amazing feat of skill and knowledge. Your prize will arrive on the second Tuesday of next week. This "everyone gets a trophy" bs is why the world is a shitehole.

[@mafiapanda]

@@OHLeftyKnifeGuy thank you friend, i look forward to that trophy

[@tanmaz8006]

​@@mafiapandadid you get your trophy 🏆 yet ??

[@Spacerowa-f4t]

You can always tell someone isn't from New Orleans when they pronounce it "New or leans" Southerners pronounce it "New or lense".

[@carlsaganlives6086]

So obviously he doesn't know shit.

[@MrGoodCat-ix3jv]

Toe fue drag prodget that's got china written all over it 😊😊😊

[@kevinquist]

I 'LOVE' how greenies gloss over facts to make their saintly new solutions look so much better. www.laiier.io/use-cases/wind-turbine-oil-leaks.