What has been getting increasingly scary in the US is the fact that a great deal of the Interstate system and other big infrastructure was built in the 50's and 60's and has now reached the end of service era... Sort of all at once. As a similar thing happens to countless suburbs. Or beachfront condos like in Surfside Florida.
Whoever came up with the idea of jacking up multiple concrete slabs on steel I-beams? I’d never seen it before this video, but it was obvious that a single failure point could collapse the whole structure.
You can see just by looking at it, that the Sydney Oprah House wouldn't give off the correct sound. The way the roof is shaped is simply incorrect. But it really is a beauty.
I have worked with engineers whom I have believed to be mentally defective. Seeking to to be lauded for designs, they have fought and destroyed those who could have done better. One designed twenty tonne railway repair machine fired a woman who changed the automatic braking so it was safe, during his absence. On a review of her dismissal, he was exposed and removed.
Same with Masons. Concrete is not a forgiving material. A carpenter can make a mistake, remove some nails and cut a new piece of wood. Any mistake with concrete is very expensive and difficult to correct. Like a database mistake or bad tattoo!
How would she know there were no earnings because those infrastructures are not MAINTAINED otherwise if they did regular inspections they would have picked up signs of failures and defects
economics drive the majority of decisions and practices in society. Slab Jacking construction is the cheapest and fastest way to put up such a tall building saving many millions of dollars. Hundreds of lift slap office buildings, apartments, and parking garages has been successfully built without incident prior to this disaster. The big advantage of erecting concrete buildings using lift slab construction is elimination of most form work and false work (false work is what failed in the 3rd story bridge disaster in the documentary), an especially important factor in areas where labor costs are high. Concrete floor construction at ground level is convenient and requires no shores, scaffolds or cranes. Slabs can be cast and protected easily during cold weather without expensive heating and rain/snow enclosures. This construction technique is still used today throughout the world. While you can't insure the construction of a 16 story building in the USA anymore, it works great for two story warehouses and parking garages. China and other places that find human life cheap use it all the time.
26:45 Ottawa ended up being chosen as the Capital in part because Canadian French burned the first parliament in Montreal. It has the dubious honor of being the only parliament building in the whole of Commonwealth to have been burnt by its citizens.
Concerning the second story in this video.Why in the world did they go with this process?I am certainly not a structural engineer.Although my brother is and he's very good at what he does.I have not spoken to him about this but it just strikes me that this was a mistake from the beginning very sad
(I suggest you use your access to the Internet and look up answers yourself, online in seconds, using google.) Most adults know that economics drive the majority of decisions and practices in society. Slab Jacking construction is the cheapest and fastest way to put up such a tall building saving many millions of dollars. Hundreds of lift slap office buildings, apartments, and parking garages has been successfully built without incident prior to this disaster. The big advantage of erecting concrete buildings using lift slab construction is elimination of most form work and false work (false work is what failed in the 3rd story bridge disaster of the documentary), an especially important factor in areas where labor costs are high. Concrete floor construction at ground level is convenient and requires no shores, scaffolds or cranes. Slabs can be cast and protected easily during cold weather without expensive heating and rain/snow enclosures.
That is a quite popular building technique around the world, it's usually cheaper than all others... I am from Eastern Europe and most of the factories and some residential buildings were built like this during the communist era. I work in a 9-floor building from the 60s that was built like this. Given that this technique was used in highly seismic regions also speaks in favor of it's qualities but, obviously, certain mistakes during the building process should not be allowed to happen.
I've seen it before - after EVERY disaster - "experts" telling us what went wrong and they're usually just stating the abundantly obvious - while that might be fair enough for an average explanation, a soundbite on the ten o'clock news - videos such as this one should be far more exacting and detailed - stuff shouldn't be made up or made to look worse than it was. Why go to the lengths of making a pretty model of red and white sticks to represent the shuttering support for the collapsed Canadian bridge - when it does not replicate the original? There WERE cross bracings in the "falsework" - obviously not enough - but it's wrong to say there weren't any at all. That lift slab building collapse looks fishy to me as well. It's not just the one curled column that sticks out for me but the fact that ALL of them have their floor wedging pads sheared off. O.K. something has to be the Initiating Failure in any collapse but why beat around the bush trying to identify it in this case when TOO MANY floors were in a mobile or temporarily parked condition? I'm pretty sure there was another collapse ( but less lethal) in Europe - again caused by attempting to jack too many floors in too short a time without first securing those in finished positions.
you are 100% correct. Like most videos versus reading a book there isn't time to communicate the true story. These failures are fare to brief to tell the real story and crafted for an elementary school audience. Sadly, they even have simplified some of the fact in the videos to the point that they are now falsehoods.
At the time they were enamored with brutalist concrete structures. Almost looks like the crap they built in the Soviet Union during the Cold War. Soviets thought nice architectural elements were "decent western values".
Hopefully anyone who copied Genoa's bridge design has seen this video. Was Lift-Slab construction banned, it is far too dangerous to save a few $ ?? Too bad the Construction crews did not spot the lack of bracing on the scaffolding. I'm sure it was in place for the other sections that had been built and poured. Good show
People aren't stupid. Workers had complained they felt the scaffolding needed more bracing. Economics drive the majority of decisions and practices and the contractor did not want to add more. Plus, there was triangle bracing on the falseworks, just pat attention at the photos in the video and you can clearly see bracing. Note: it is not scaffolding, it is falsework. Falsework supports the formwork. Scaffolding is for the labor (people) and materials. Painters use scaffolding. The engineering professor is making a false statement when quoted in this video. Lift-Slab is not banned in most states, just difficult to insure for a 16 story building in the USA. However, it still works for a two story parking garage or to lift a suburban home above flood level due to rising sea levels. It is still used in China and every third world country where human life is cheap and the Government has little regulation.
@@rfarevalo Im sure workers complained. As always "cost savings" rules. Same story as WTC. Saw and worked on many projects in NYC, our Unions would have stopped those issues. Sad so many paid for money grubbing swine. Did anyone go to jail??
It's frustrating when you can't watch the video properly because you're too busy reading subtitles. I wish you could just dub over the voices in English.
A language not spoken becomes dead. Language influences thought patterns and creativity, so diversity in language will advance abstract thought, which becomes art and science. English is far from the easiest on the ear. I appreciated the speech and with large subtitles and some schooling in another related language had no trouble with the content. Well spoken Italian, French and Portuguese just sound better than halting English with the corresponding accent, to my ear.
Because Italians are confident that if they have to say something then they will say it and we will find out what they said because they’re an amazingly intelligent group and I’m saying this because they invented pizza! I mean.. need I say more! They’re brilliant!
Anyone else finding the voice of the narrator annoying and also kind of ridiculous? I'm only two and a half minutes in and I feel like I'm watching a terribly narrated movie trailer, voiced by some British dude doing his best American movie trailer voice while maintaining his native accent🙂
What has been getting increasingly scary in the US is the fact that a great deal of the Interstate system and other big infrastructure was built in the 50's and 60's and has now reached the end of service era... Sort of all at once. As a similar thing happens to countless suburbs. Or beachfront condos like in Surfside Florida.
@7:18. My heart aches for this poor guy as I just couldn't imagine reliving something like that whenever you tell the story.
Whoever came up with the idea of jacking up multiple concrete slabs on steel I-beams? I’d never seen it before this video, but it was obvious that a single failure point could collapse the whole structure.
You can see just by looking at it, that the Sydney Oprah House wouldn't give off the correct sound. The way the roof is shaped is simply incorrect. But it really is a beauty.
I have worked with engineers whom I have believed to be mentally defective. Seeking to to be lauded for designs, they have fought and destroyed those who could have done better. One designed twenty tonne railway repair machine fired a woman who changed the automatic braking so it was safe, during his absence. On a review of her dismissal, he was exposed and removed.
I like disaster stories…people can learn a lot. If everything works right away, nobody would be able to learn anything. It is human…to make a mistake.
Not when your a structural engineer or architect. There job is to get it right!!
Same with Masons. Concrete is not a forgiving material. A carpenter can make a mistake, remove some nails and cut a new piece of wood. Any mistake with concrete is very expensive and difficult to correct. Like a database mistake or bad tattoo!
How would she know there were no earnings because those infrastructures are not MAINTAINED otherwise if they did regular inspections they would have picked up signs of failures and defects
25:00: The proverbial “straw that broke the camel’s back, very sadly…
Have you done an episode about the Westgate Bridge collapse in Melbourne Australia ?
economics drive the majority of decisions and practices in society. Slab Jacking construction is the cheapest and fastest way to put up such a tall building saving many millions of dollars. Hundreds of lift slap office buildings, apartments, and parking garages has been successfully built without incident prior to this disaster. The big advantage of erecting concrete buildings using lift slab construction is elimination of most form work and false work (false work is what failed in the 3rd story bridge disaster in the documentary), an especially important factor in areas where labor costs are high. Concrete floor construction at ground level is convenient and requires no shores, scaffolds or cranes. Slabs can be cast and protected easily during cold weather without expensive heating and rain/snow enclosures. This construction technique is still used today throughout the world. While you can't insure the construction of a 16 story building in the USA anymore, it works great for two story warehouses and parking garages. China and other places that find human life cheap use it all the time.
26:45 Ottawa ended up being chosen as the Capital in part because Canadian French burned the first parliament in Montreal. It has the dubious honor of being the only parliament building in the whole of Commonwealth to have been burnt by its citizens.
Concerning the second story in this video.Why in the world did they go with this process?I am certainly not a structural engineer.Although my brother is and he's very good at what he does.I have not spoken to him about this but it just strikes me that this was a mistake from the beginning very sad
(I suggest you use your access to the Internet and look up answers yourself, online in seconds, using google.) Most adults know that economics drive the majority of decisions and practices in society. Slab Jacking construction is the cheapest and fastest way to put up such a tall building saving many millions of dollars. Hundreds of lift slap office buildings, apartments, and parking garages has been successfully built without incident prior to this disaster. The big advantage of erecting concrete buildings using lift slab construction is elimination of most form work and false work (false work is what failed in the 3rd story bridge disaster of the documentary), an especially important factor in areas where labor costs are high. Concrete floor construction at ground level is convenient and requires no shores, scaffolds or cranes. Slabs can be cast and protected easily during cold weather without expensive heating and rain/snow enclosures.
That is a quite popular building technique around the world, it's usually cheaper than all others... I am from Eastern Europe and most of the factories and some residential buildings were built like this during the communist era. I work in a 9-floor building from the 60s that was built like this. Given that this technique was used in highly seismic regions also speaks in favor of it's qualities but, obviously, certain mistakes during the building process should not be allowed to happen.
Bridgeport CT is where I was born.
I've seen it before - after EVERY disaster - "experts" telling us what went wrong and they're usually just stating the abundantly obvious - while that might be fair enough for an average explanation, a soundbite on the ten o'clock news - videos such as this one should be far more exacting and detailed - stuff shouldn't be made up or made to look worse than it was.
Why go to the lengths of making a pretty model of red and white sticks to represent the shuttering support for the collapsed Canadian bridge - when it does not replicate the original? There WERE cross bracings in the "falsework" - obviously not enough - but it's wrong to say there weren't any at all.
That lift slab building collapse looks fishy to me as well. It's not just the one curled column that sticks out for me but the fact that ALL of them have their floor wedging pads sheared off. O.K. something has to be the Initiating Failure in any collapse but why beat around the bush trying to identify it in this case when TOO MANY floors were in a mobile or temporarily parked condition? I'm pretty sure there was another collapse ( but less lethal) in Europe - again caused by attempting to jack too many floors in too short a time without first securing those in finished positions.
you are 100% correct. Like most videos versus reading a book there isn't time to communicate the true story. These failures are fare to brief to tell the real story and crafted for an elementary school audience. Sadly, they even have simplified some of the fact in the videos to the point that they are now falsehoods.
2:10 Dude are you Crazy? how could you compare a mere bridge colapse to the Vajont Dam
when I saw the model of how they did it..nope not gonna work well and I aint a architect!
A polyester water proof coating would have help
Genoa bridge was such an ugly design!
At the time they were enamored with brutalist concrete structures. Almost looks like the crap they built in the Soviet Union during the Cold War. Soviets thought nice architectural elements were "decent western values".
Hopefully anyone who copied Genoa's bridge design has seen this video. Was Lift-Slab construction banned, it is far too dangerous to save a few $ ?? Too bad the Construction crews did not spot the lack of bracing on the scaffolding. I'm sure it was in place for the other sections that had been built and poured. Good show
People aren't stupid. Workers had complained they felt the scaffolding needed more bracing. Economics drive the majority of decisions and practices and the contractor did not want to add more. Plus, there was triangle bracing on the falseworks, just pat attention at the photos in the video and you can clearly see bracing. Note: it is not scaffolding, it is falsework. Falsework supports the formwork. Scaffolding is for the labor (people) and materials. Painters use scaffolding. The engineering professor is making a false statement when quoted in this video. Lift-Slab is not banned in most states, just difficult to insure for a 16 story building in the USA. However, it still works for a two story parking garage or to lift a suburban home above flood level due to rising sea levels. It is still used in China and every third world country where human life is cheap and the Government has little regulation.
@@rfarevalo Im sure workers complained. As always "cost savings" rules. Same story as WTC. Saw and worked on many projects in NYC, our Unions would have stopped those issues. Sad so many paid for money grubbing swine. Did anyone go to jail??
It's frustrating when you can't watch the video properly because you're too busy reading subtitles. I wish you could just dub over the voices in English.
All the educated people from around the globe speak English, but not Italians for some reason. I’ve seen it many times.
A language not spoken becomes dead. Language influences thought patterns and creativity, so diversity in language will advance abstract thought, which becomes art and science. English is far from the easiest on the ear. I appreciated the speech and with large subtitles and some schooling in another related language had no trouble with the content. Well spoken Italian, French and Portuguese just sound better than halting English with the corresponding accent, to my ear.
Are you a native? How many languages do you speak?
@@ukaszglinski2687 No English is not my native, and I’m fluent in two and know a little in three others.
Because Italians are confident that if they have to say something then they will say it and we will find out what they said because they’re an amazingly intelligent group and I’m saying this because they invented pizza! I mean.. need I say more! They’re brilliant!
@@mitchybooooy Yes love many many things about Italia.
Anyone else finding the voice of the narrator annoying and also kind of ridiculous?
I'm only two and a half minutes in and I feel like I'm watching a terribly narrated movie trailer, voiced by some British dude doing his best American movie trailer voice while maintaining his native accent🙂
I DONT GET WHY LIGHTWEIGHT CONCRETE IS N O T BEING USED IN THOSE PANCAKE BUILDINGS FOR FLOORS...!