That open-space concept without supporting columns was the main weakness of the towers. Good job with this animation, one of the best explanations of the WTC construction.
This is really great, the only video about the construction before yours was honestly the documentaries made WHEN the towers were built in the late 60's/early 70's.
Thank you so much! There’s so much history and innovation in the construction of the towers, and I’m glad I could bring that to light for a new generation of viewers!
This is very well done. I've been reading up on the construction of the complex for years out of fascination, especially with the then-revolutionary open-floor concept.
Looking at the layout of the floor plan, I think it would’ve been a good idea to put two columns in the center of each open space in the building. If not on all four sides, at least where the open area was to add additional support.
Thanks for your comment! The designers of the World Trade Center actually used a revolutionary approach called the 'tube-frame structure', which allowed the towers to remain open and flexible inside. Instead of using central columns throughout the floors, they placed most of the structural support in the perimeter columns and the core, which housed elevators and utilities. This gave tenants large, open floor plans without many internal columns, which was a big advantage for businesses. It was a balance between structural integrity and maximizing usable space, which was cutting-edge at the time. Your suggestion could have added support but would have changed the flexibility and open design that was part of the building’s unique appeal.
I always thought 4 extra core columns on the 4 corners with a stairwell built in between each one would of saved hundreds more lives that day and wouldn't have compromised that much on space and added more support for the structure. But I'm no structural engineer...
The problem wasn't the lack of columns on the open space. The problem was that the floor trusses joints gave way when under high temperatures, the fire, the weight of additional floors and planes started a chain reaction. If it had been a bomb instead of a plane they wouldn't have collapsed. The problem was the the trusses under heavy load and the fire.
I worked to do an office build out on the 83 floor. We installed floor to ceiling solid doors on pivots. It was amazing to me how much the plumber bob would swing when after installingbthe top pivit we had to locate the spot for bottom pivot. The plumbbpb would swing an inch or so back and forth sometimes we’d slit the difference and adjust later when we saw the gap at the jamb
That’s an awesome story! Thanks for sharing your experience....it's incredible to hear firsthand how much the building would move at those heights! Must have been quite the challenge!
Very informative video. However, one issue caught my attention. The underground shopping mall and parking facilities were on levels surrounding the towers but did not actually extend into their basement levels as the narration would seem to indicate.
Thanks so much for the feedback! My narration may have been a bit unclear on that point. I appreciate you catching it, and I’ll make sure to clarify that detail more accurately in future videos!
This is the video I was searching for so long glad u make this 😊😊❤ I have a question that how the people enters in tower i don't see any gate or special opening entrance?
Thanks so much! I’m glad you found the video helpful! Great question-while the video may not have shown it in detail, the main entrances to the towers were located on the ground level, through large revolving doors and glass entrances at the plaza level. People would enter through these doors into the lobby areas, which were spacious and had direct access to elevators. The World Trade Center had multiple entrances, including ones from the underground concourse that connected to the subway and PATH trains, making it easily accessible for thousands of workers and visitors every day.
There were actually 6 basements, the b1 level was basement 1 and house areas like the truck dock and customs parking as well as the operations control center. The tower entrances, mall, path entrances as well as other subways were located one level upbove the b1 on the Concourse level
The mall wasn’t underground, as it was connected to the lobby of the towers It was more so that the other side had streets that were higher so it made it seem as if it were underground
@@3dcasuallearning > FEMA 403_ch-2 has correct data on Twin Towers construction > "Breathtaking: Solving Nuclear 9/11" at Veterans Today has correct WTC destruction, 45 power point slides, three 90 min videos
It was common knowledge in the intelligence community that the WTC towers were designed with the nuclear demolition scheme in place as a precondition of getting the building permit from the city.
Thank you so much, Rafay! 😊 Doing TH-cam is definitely hard work, and I really appreciate your kind words! I never really aim for a huge number of subscribers-I just focus on improving my videos so they can bring more value to viewers like you. I’ll keep your name in mind, and if I ever hit 100k, I’d be happy to give you a shoutout! Thanks again for your support, it means a lot!
I think it be coold to mention what was underground the concourse like for instance where the subway lines ran through, and like was on on the B-6 level between the two towers
You left out the all important story of how an entirely new building code was created simply to allow a reduction of the number of required stairways and the width of those stairways. The "core" walls were simple drywall and lacked strength and allowed easy penetration (a group of men trapped in a stuck elevator were able to dig through these walls with nothing more than a squeegee) simply to lower construction costs. Each floor consisted of 4 inches of concrete on metal decking supported by the sort of trusses that can be found holding up the ceilings in most "big box" stores such as Lowes, Best Buy, Home Depot, etc.. Cheap and flimsy. The code changes were vehemently opposed by Fire Dept officials, to no avail. More rentable space = greater profit. A few years after completion, low quality spray-on "fireproofing" was used to mitigate the original asbestos protection. The impact of the jetliners apparently knocked a large amount of this off of the steel it was supposed to protect. When you strip away all the BS, the "city fathers" and the "money men" (Rockefellers) essentially murdered hundreds of police and fire responders years before Bin Laden did.
Thank you for sharing such detailed insights. You bring up some important points about the design and building code changes made during the construction of the World Trade Center. The complex balance between cost, safety, and innovation during such a monumental project certainly shaped its legacy in both positive and controversial ways. The fireproofing, stairwells, and core structure have been key topics of discussion, especially after 9/11. These are complicated issues, and I appreciate you bringing them into the conversation for a deeper understanding of the decisions made. If you have more info or sources on this, I’d love to dive deeper into it in future content.
What was never mentioned is did the “planning organization” do a structural analysis of the buildings? If they chose the Empire State or Chrysler, the ultimate effect would have been very different. Likely just the upper portions of those buildings would have toppled over. Don’t think pancaking is necessary with Empire State. Even Sear’s Tower. And Library Tower. Is that why the “bigger plot” was wound back? While clever in terms of cost and efficiency to build, the building essentially had floors cantilevered dozens of feet out with basically sheer walls keeping them in place. Crazy. Not even residential buildings are allowed built like this, relatively speaking. Obviously a gross simplification of what’s going on, but that was the general concept of these things. It’s a literal Jenga tower. Take one block out… entire system failure. Edit: Possible not necessary.
Thanks for your detailed comment! The unique design of the World Trade Center, particularly the tube-frame structure, was very different from buildings like the Empire State Building or the Chrysler Building. The WTC used a perimeter column design that supported much of the load, allowing for the large, open floor plans inside-something revolutionary at the time. While this design made the towers cost-efficient and flexible, it also behaved differently under extreme circumstances, such as the events of 9/11. Other skyscrapers, like the Empire State Building, use more traditional construction methods with denser central cores and more distributed structural elements. This might lead to different failure mechanisms in extreme scenarios. Structural analysis was certainly part of the original planning, but no design could have anticipated the impact and subsequent fires in the way they happened. It's a complex topic, but I appreciate your thoughtful input on the differences between these iconic buildings!
There is a long answer here, so bear with me. KSM, Bin Laden, and maybe some other al Qaeda people had the “planes operation” as an idea for many years. But of course, they needed the right people to do it. And it wasn’t until Haburg cell members came into the picture that the idea was given to them to carry out. But I believe it was Bin Laden who was adamant that one of the targets was the WTC. They wanted to kill a lot of people, but it also symbolized American capitalism. They did like you said have a larger plan originally with like nine planes, and some of the targets were even nuclear power plants, but it’s said that Bin Laden nixed that idea because “it could get too messy”. And I’m just guessing the idea of nine hijacked planes was lowered just because it wasn’t easy to find men that could speak English, get a US visa, smart enough to take pilot lessons and learn to fly, blend in long enough that they didn’t attract any attention, among other issues. One of their guys already kept being denied entry so they had to replace him with Hani Hanjour. If they tried to go beyond the four, they went with there was a real risk of it being thwarted. It was already known al Qaeda was determined to attack inside the US, intelligence just couldn’t pinpoint when, where and how. Bin Laden, none of them when selecting targets looked at the structural integrity of the building, or at least probably in the detail like you are thinking. The first WTC bombing, the idea was to put a bomb next to a column in the parking garage under the tower, detonate it, and make that tower tip over and fall into the other tower, but none of the terrorists expected in a million years that the towers would fully collapse as they did on 9/11. So, to answer your question, no that would not of been the reason why they wound back the bigger plot. The main reasons being what I mentioned before. I believe when Bin Laden and the upper echelon of Al Quida saw both towers collapse, I’m sure at first, they were elated, but then I think a few of them started to realize they had hit a nerve in Americans and that was going to be the beginning of the end for many of them. It was one thing to attack US embassies overseas. Most Americans were, and still are oblivious to anything going on outside of our country. But when the towers collapsed, that was a whole new ball game. Had they just been hit with planes and stayed up, I think it still would have been an extremely monumental event that changed a lot of things in this country and the world, but because they did, everything changed since. Now I’m not a structural engineer, but I play one on TH-cam. I know the buildings were designed to be extremely lightweight, they won awards for it the year they were built. But I think if they utilized concrete more, encasing floor trusses, or just not using floor trusses at all and using structural steel to span from the perimeter walls to the core columns, still encasing them in concrete, that could have possibly made a difference.
The open floor plan was a driving factor for the design. However, what I don't fully understand is if this was so important why wasn't each floor designed with higher ceilings? The typical ceiling height on each floor was so low. The interior seemed claustrophobic. It really defeated the open plan design.
The typical floor-to-ceiling height in the World Trade Center was around 8.5 feet, which was common for office buildings at that time. While it may feel low by today's standards, it was designed to fit within the structural limits and design goals of the era.
@@3dcasuallearning 8.5ft is a typical ceiling height. Today, tomorrow, always. The building was designed with those ceiling heights to maximize space which maximized leasable area which maximized profits.
True, the construction story shifted after 9/11, but the rebuilding of the new World Trade Center still carries a powerful message of resilience and renewal.
Unfortunately, the fireproofing in the WTC wasn’t as effective as hoped, especially with the impact and heat from the crashes. It’s a tragic reminder of how critical safety advancements are in construction.
There are no concrete slabs on the floors here, It is almost entirely of iron construction, the question arises, where did so much dust come from on September 11? How did the building turn into a mass of dust? Maybe there were specially placed thermite detonators that reduced the iron to dust? 😉
8:05 The Twin Towers actually did have concrete floor slabs supported by steel trusses. During the collapse, the combination of the concrete crushing, drywall, and other building materials created a huge amount of dust. There’s been a lot of research and investigations into the collapse, and while theories like thermite have been discussed, official reports concluded that the intense fires and structural damage from the plane impacts led to the towers' collapse.
@nicathsimov7624, you are a sadly misinformed individual. Each floor consisted of 4 inches of concrete on metal decking supported by flimsy trusses. That adds up to almost 110 acres of 4" thick concrete in each tower.
Only thing that would “pancake” might be the floors spanning between the core and exterior columns (and there is no 100 floor stack in the rubble pile) but no way would the verticle steel columns pancake and most certainly not at the same free fall rate we witnessed in videos, thus that leaves only one explaination that fits it all together perfectly.
Thanks for sharing your perspective! The collapse of the towers has been widely studied, and I encourage looking into the engineering reports for more detailed explanations of how it all happened.
@@3dcasuallearning Widely studied by who? The government that did it? I encourage you to read government conspiracies like Operation Northwoods,and for media complicity Operation Mockingbird also study bld 7 that was a completely different structural configuration not hit by anything yet fell by fire after the owner said “pull it”
Este video es la prueba reina de como los incendios se concentraron en los asbestos por eso se ven esas estelas de humo en el cielo una demolicion controlada no deja todo ese humo en el cielo muy triste lo que mas me impresiono fue cuando supe que la pelicula infierno en la torre 1974 era un libro escrito para gacerle un homenaje a las torres gemelas la pelicula la mire en 1986 muy premonitorio lo que le dice steve mc queen a paul newman ojala una de estas malditas trampas no maten a unas 10000 personas y sucedio en las torres gemelas el incendio en la pelicula es provocado por un corto circuito los incendios del word trade center se concentraron en los asbestos tubos de ventilacion y computadores avivados por el aire y los cortos circuitos no tiene ningun misterio h ciencia entender lo que sucedio ese dia nadie imaginaba que todos esos incendios este video esta explicado todo jimmy hernandez😮😮😮
@@joedoe-sedoe7977There have been independent investigations of the collapses, minus the NIST. Building 7 was hit by debris from the collapse of the north tower. The owner saying pull it, in the context of his his quote means nothing. Unless you think the fire department was in on the plot.
Entschuldigung dafür! Ich werde versuchen, die Textplatzierung in zukünftigen Videos zu verbessern. Was Ihre Frage betrifft, ja, leider haben mehrere Arbeiter während des Baus des World Trade Centers ihr Leben verloren. Die Sicherheitsstandards verbesserten sich zu dieser Zeit, aber es war immer noch ein gefährlicher Job.
@@3dcasuallearning schon gut, ich hatte dadurch schon die Vermutung das beim Bau schon leben verloren ging. Das erinnert mich an die Titanic. Bei deren Bau starben auch schon so einige. Ich hab mich eh gefragt wie es nur möglich war diese enorm hohen Wolkenkratzer zu bauen. Ich war 6 Jahre alt als sie zerstört wurden zusammen mit so vielen Leben. Unglaublich was der Mensch alles erschaffen aber zur gleichen Zeit wiederum zerstören kann.
Thanks for watching! 😊 The other mechanical floors are actually mentioned at 5:35 if you want to revisit that part. Let me know if there’s anything specific you’d like more info on!
@@3dcasuallearning perhaps more detail information needed, that gave the two towers the famous visible "band"... at first i thought it's the sky lobby because it gave the sense there were two open wide floors just like the main lobby.. but later i was corrected that it was the mechanical floors, and it didn't featured windows like other floors.. but appreciate your video, because as english is not my first language, i did find hard to find the definiition of "slurry walls", and your video explains it better...
Thank you for sharing your thoughts. Rebuilding after a tragedy sparked many emotions and viewpoints, and ultimately, the decision to create the new WTC was seen by many as a tribute to resilience and remembrance. While the new design is different, it was shaped to honor those we lost and to serve as a symbol of renewal for New York City and beyond.
@@3dcasuallearning And it does a terrible job as it tries to make you forget the Original Center and its Symbolism and Purpose, therefore disrespecting the fallen and that SHOULD be on Everyone’s mind. Thank you for replying.
While it may feel different to many, it was intended to be a space for reflection, unity, and moving forward. It’s always important to remember the original towers’ significance, and your comment is a great reminder of that.
@@mrandrossguy9871Don’t forget about the fountains of where the 2 towers used to be. The fountains of the two towers honor people who have died in the collapse, even stating their names. So, they did NOT do a terrible job.
@@3dcasuallearningI think it’s very controversial, but if they weren’t going to rebuild the towers exactly as they stood but taller, I am relatively happy with the current design. Riding down the West Side Highway Bikepath and seeing Freedom tower is always beautiful. Even if I was not able to witness the original towers in the skyline. Thank you for the very informative video.
Ground Zero refers to the site directly where a significant event occurred, like a disaster or explosion. In the case of 9/11, it’s the area where the World Trade Center towers stood before they collapsed.
Thank you for your comment. New York has certainly seen its share of triumphs and tragedies, and the history of the World Trade Center is a powerful reminder of both.
in your 200th sub, please pin
Thanks!
Wow! Your momma must be proud🎉
That open-space concept without supporting columns was the main weakness of the towers. Good job with this animation, one of the best explanations of the WTC construction.
The open-space design was definitely innovative but came with its challenges. Glad you enjoyed the animation and explanation!
This is really great, the only video about the construction before yours was honestly the documentaries made WHEN the towers were built in the late 60's/early 70's.
Thank you so much! There’s so much history and innovation in the construction of the towers, and I’m glad I could bring that to light for a new generation of viewers!
This is very well done. I've been reading up on the construction of the complex for years out of fascination, especially with the then-revolutionary open-floor concept.
Glad it was helpful!
Looking at the layout of the floor plan, I think it would’ve been a good idea to put two columns in the center of each open space in the building. If not on all four sides, at least where the open area was to add additional support.
Thanks for your comment! The designers of the World Trade Center actually used a revolutionary approach called the 'tube-frame structure', which allowed the towers to remain open and flexible inside. Instead of using central columns throughout the floors, they placed most of the structural support in the perimeter columns and the core, which housed elevators and utilities. This gave tenants large, open floor plans without many internal columns, which was a big advantage for businesses. It was a balance between structural integrity and maximizing usable space, which was cutting-edge at the time. Your suggestion could have added support but would have changed the flexibility and open design that was part of the building’s unique appeal.
@@3dcasuallearning but it may have prevented the buildings from collapsing on 9-11.
I always thought 4 extra core columns on the 4 corners with a stairwell built in between each one would of saved hundreds more lives that day and wouldn't have compromised that much on space and added more support for the structure. But I'm no structural engineer...
The problem wasn't the lack of columns on the open space. The problem was that the floor trusses joints gave way when under high temperatures, the fire, the weight of additional floors and planes started a chain reaction. If it had been a bomb instead of a plane they wouldn't have collapsed. The problem was the the trusses under heavy load and the fire.
@@0neoyou’re saying the Weight of the Planes that were STILL Inside the buildings/of course Mangled, Added to the Structural failure !?
I worked to do an office build out on the 83 floor. We installed floor to ceiling solid doors on pivots. It was amazing to me how much the plumber bob would swing when after installingbthe top pivit we had to locate the spot for bottom pivot. The plumbbpb would swing an inch or so back and forth sometimes we’d slit the difference and adjust later when we saw the gap at the jamb
That’s an awesome story! Thanks for sharing your experience....it's incredible to hear firsthand how much the building would move at those heights! Must have been quite the challenge!
Very informative video. However, one issue caught my attention. The underground shopping mall and parking facilities were on levels surrounding the towers but did not actually extend into their basement levels as the narration would seem to indicate.
Thanks so much for the feedback! My narration may have been a bit unclear on that point. I appreciate you catching it, and I’ll make sure to clarify that detail more accurately in future videos!
@@3dcasuallearningcan you clarify why 3000 bodies disappeared?
Good Information Thank You🙏🌹
You're welcome! Glad you found it helpful. 🙏
Very underrated chanel. Awesome!
Much appreciated!
Great video. Thank you!
Glad you liked it!
This is the video I was searching for so long glad u make this 😊😊❤ I have a question that how the people enters in tower i don't see any gate or special opening entrance?
Thanks so much! I’m glad you found the video helpful! Great question-while the video may not have shown it in detail, the main entrances to the towers were located on the ground level, through large revolving doors and glass entrances at the plaza level. People would enter through these doors into the lobby areas, which were spacious and had direct access to elevators. The World Trade Center had multiple entrances, including ones from the underground concourse that connected to the subway and PATH trains, making it easily accessible for thousands of workers and visitors every day.
Well explained and amazing animation. You deserve more likes support 💖💖💖
Thank you so much! 🙏 I’m really glad you enjoyed the video and animation. Your support means a lot! 😊"
Very educational bro, thank you for making this video!
thank you.
You're welcome
There were actually 6 basements, the b1 level was basement 1 and house areas like the truck dock and customs parking as well as the operations control center. The tower entrances, mall, path entrances as well as other subways were located one level upbove the b1 on the Concourse level
Thanks for sharing that detailed info!
The intro threw me off, thought I'd started watching a Retrobird video for a second!
Haha, I see what you mean! 😄 Glad you stuck around though! I’ll keep that in mind for future intros-thanks for the feedback!
Well done and kudos to you.
A brilliant presentation kiddo !
From: Pittsburgh Pennsylvania, USA
Thank you so much! I’m really glad you enjoyed the video. Shoutout to Pittsburgh, Pennsylvania! Your support means a lot-thanks for watching!
The mall wasn’t underground, as it was connected to the lobby of the towers
It was more so that the other side had streets that were higher so it made it seem as if it were underground
Eran hermosas esas torres, el poder humano, la altura!
Ellos realmente eran!
@@3dcasuallearning
Eran!
Spandrel steel at every floor was 52" high, 2" thick plate > "Unequivocal 9/11 Nukes" at Veterans Today, real forensic engineer analysis
Thanks for sharing your thoughts! Interesting point about the spandrel steel dimensions.
@@3dcasuallearning > FEMA 403_ch-2 has correct data on Twin Towers construction > "Breathtaking: Solving Nuclear 9/11" at Veterans Today has correct WTC destruction, 45 power point slides, three 90 min videos
It was common knowledge in the intelligence community that the WTC towers were designed with the nuclear demolition scheme in place as a precondition of getting the building permit from the city.
This channel is so amazing and it's underrated,can you please say my name in your video when you hit 100k
Regards rafay
Thank you so much, Rafay! 😊 Doing TH-cam is definitely hard work, and I really appreciate your kind words! I never really aim for a huge number of subscribers-I just focus on improving my videos so they can bring more value to viewers like you. I’ll keep your name in mind, and if I ever hit 100k, I’d be happy to give you a shoutout! Thanks again for your support, it means a lot!
@@3dcasuallearning may you succeed soon✨
I think it be coold to mention what was underground the concourse like for instance where the subway lines ran through, and like was on on the B-6 level between the two towers
Great point! Thanks for the suggestion-I'll keep that in mind for future videos!
You left out the all important story of how an entirely new building code was created simply to allow a reduction of the number of required stairways and the width of those stairways. The "core" walls were simple drywall and lacked strength and allowed easy penetration (a group of men trapped in a stuck elevator were able to dig through these walls with nothing more than a squeegee) simply to lower construction costs. Each floor consisted of 4 inches of concrete on metal decking supported by the sort of trusses that can be found holding up the ceilings in most "big box" stores such as Lowes, Best Buy, Home Depot, etc.. Cheap and flimsy. The code changes were vehemently opposed by Fire Dept officials, to no avail. More rentable space = greater profit. A few years after completion, low quality spray-on "fireproofing" was used to mitigate the original asbestos protection. The impact of the jetliners apparently knocked a large amount of this off of the steel it was supposed to protect. When you strip away all the BS, the "city fathers" and the "money men" (Rockefellers) essentially murdered hundreds of police and fire responders years before Bin Laden did.
Thank you for sharing such detailed insights. You bring up some important points about the design and building code changes made during the construction of the World Trade Center. The complex balance between cost, safety, and innovation during such a monumental project certainly shaped its legacy in both positive and controversial ways. The fireproofing, stairwells, and core structure have been key topics of discussion, especially after 9/11. These are complicated issues, and I appreciate you bringing them into the conversation for a deeper understanding of the decisions made. If you have more info or sources on this, I’d love to dive deeper into it in future content.
So they built them like you'd build a ship.
Bada Bing. Bada Bang. Bada BOOM!
i am your 400th sub
Thanks!
What was never mentioned is did the “planning organization” do a structural analysis of the buildings? If they chose the Empire State or Chrysler, the ultimate effect would have been very different. Likely just the upper portions of those buildings would have toppled over. Don’t think pancaking is necessary with Empire State. Even Sear’s Tower. And Library Tower.
Is that why the “bigger plot” was wound back?
While clever in terms of cost and efficiency to build, the building essentially had floors cantilevered dozens of feet out with basically sheer walls keeping them in place. Crazy. Not even residential buildings are allowed built like this, relatively speaking. Obviously a gross simplification of what’s going on, but that was the general concept of these things. It’s a literal Jenga tower. Take one block out… entire system failure.
Edit: Possible not necessary.
Thanks for your detailed comment! The unique design of the World Trade Center, particularly the tube-frame structure, was very different from buildings like the Empire State Building or the Chrysler Building. The WTC used a perimeter column design that supported much of the load, allowing for the large, open floor plans inside-something revolutionary at the time. While this design made the towers cost-efficient and flexible, it also behaved differently under extreme circumstances, such as the events of 9/11.
Other skyscrapers, like the Empire State Building, use more traditional construction methods with denser central cores and more distributed structural elements. This might lead to different failure mechanisms in extreme scenarios. Structural analysis was certainly part of the original planning, but no design could have anticipated the impact and subsequent fires in the way they happened. It's a complex topic, but I appreciate your thoughtful input on the differences between these iconic buildings!
There is a long answer here, so bear with me. KSM, Bin Laden, and maybe some other al Qaeda people had the “planes operation” as an idea for many years. But of course, they needed the right people to do it. And it wasn’t until Haburg cell members came into the picture that the idea was given to them to carry out. But I believe it was Bin Laden who was adamant that one of the targets was the WTC. They wanted to kill a lot of people, but it also symbolized American capitalism. They did like you said have a larger plan originally with like nine planes, and some of the targets were even nuclear power plants, but it’s said that Bin Laden nixed that idea because “it could get too messy”. And I’m just guessing the idea of nine hijacked planes was lowered just because it wasn’t easy to find men that could speak English, get a US visa, smart enough to take pilot lessons and learn to fly, blend in long enough that they didn’t attract any attention, among other issues. One of their guys already kept being denied entry so they had to replace him with Hani Hanjour. If they tried to go beyond the four, they went with there was a real risk of it being thwarted. It was already known al Qaeda was determined to attack inside the US, intelligence just couldn’t pinpoint when, where and how.
Bin Laden, none of them when selecting targets looked at the structural integrity of the building, or at least probably in the detail like you are thinking. The first WTC bombing, the idea was to put a bomb next to a column in the parking garage under the tower, detonate it, and make that tower tip over and fall into the other tower, but none of the terrorists expected in a million years that the towers would fully collapse as they did on 9/11. So, to answer your question, no that would not of been the reason why they wound back the bigger plot. The main reasons being what I mentioned before.
I believe when Bin Laden and the upper echelon of Al Quida saw both towers collapse, I’m sure at first, they were elated, but then I think a few of them started to realize they had hit a nerve in Americans and that was going to be the beginning of the end for many of them. It was one thing to attack US embassies overseas. Most Americans were, and still are oblivious to anything going on outside of our country. But when the towers collapsed, that was a whole new ball game. Had they just been hit with planes and stayed up, I think it still would have been an extremely monumental event that changed a lot of things in this country and the world, but because they did, everything changed since.
Now I’m not a structural engineer, but I play one on TH-cam. I know the buildings were designed to be extremely lightweight, they won awards for it the year they were built. But I think if they utilized concrete more, encasing floor trusses, or just not using floor trusses at all and using structural steel to span from the perimeter walls to the core columns, still encasing them in concrete, that could have possibly made a difference.
my nana said i cant wonder off unless im holding rachys hand
Sounds like your Nana is making sure you stay safe!
Subscribed #361👍
Thanks!
The open floor plan was a driving factor for the design. However, what I don't fully understand is if this was so important why wasn't each floor designed with higher ceilings? The typical ceiling height on each floor was so low. The interior seemed claustrophobic. It really defeated the open plan design.
The typical floor-to-ceiling height in the World Trade Center was around 8.5 feet, which was common for office buildings at that time. While it may feel low by today's standards, it was designed to fit within the structural limits and design goals of the era.
@@3dcasuallearning 8.5ft is a typical ceiling height. Today, tomorrow, always. The building was designed with those ceiling heights to maximize space which maximized leasable area which maximized profits.
The ceiling for numbers of bodies disappearing in a building collapse is less than 10% . How could that number become 90% ???!!!
Interesting video, but the AI audio is offputting to listen to.
Thanks for the feedback! I'll keep that in mind for future videos and work on improving the audio. Appreciate you watching!
Well there isn't much of a construction story after 9/11
True, the construction story shifted after 9/11, but the rebuilding of the new World Trade Center still carries a powerful message of resilience and renewal.
I hate that fire proof stuff they used, didn't work.
Unfortunately, the fireproofing in the WTC wasn’t as effective as hoped, especially with the impact and heat from the crashes. It’s a tragic reminder of how critical safety advancements are in construction.
There are no concrete slabs on the floors here, It is almost entirely of iron construction, the question arises, where did so much dust come from on September 11? How did the building turn into a mass of dust? Maybe there were specially placed thermite detonators that reduced the iron to dust? 😉
8:05 The Twin Towers actually did have concrete floor slabs supported by steel trusses. During the collapse, the combination of the concrete crushing, drywall, and other building materials created a huge amount of dust. There’s been a lot of research and investigations into the collapse, and while theories like thermite have been discussed, official reports concluded that the intense fires and structural damage from the plane impacts led to the towers' collapse.
Another toilet seat expert
@nicathsimov7624, you are a sadly misinformed individual. Each floor consisted of 4 inches of concrete on metal decking supported by flimsy trusses. That adds up to almost 110 acres of 4" thick concrete in each tower.
أنت من جماعة نظرية المؤامرة المتخلفة عقليا 😂😂😂
Only thing that would “pancake” might be the floors spanning between the core and exterior columns (and there is no 100 floor stack in the rubble pile) but no way would the verticle steel columns pancake and most certainly not at the same free fall rate we witnessed in videos, thus that leaves only one explaination that fits it all together perfectly.
Thanks for sharing your perspective! The collapse of the towers has been widely studied, and I encourage looking into the engineering reports for more detailed explanations of how it all happened.
@@3dcasuallearning Widely studied by who? The government that did it? I encourage you to read government conspiracies like Operation Northwoods,and for media complicity Operation Mockingbird also study bld 7 that was a completely different structural configuration not hit by anything yet fell by fire after the owner said “pull it”
Oh shut up
Este video es la prueba reina de como los incendios se concentraron en los asbestos por eso se ven esas estelas de humo en el cielo una demolicion controlada no deja todo ese humo en el cielo muy triste lo que mas me impresiono fue cuando supe que la pelicula infierno en la torre 1974 era un libro escrito para gacerle un homenaje a las torres gemelas la pelicula la mire en 1986 muy premonitorio lo que le dice steve mc queen a paul newman ojala una de estas malditas trampas no maten a unas 10000 personas y sucedio en las torres gemelas el incendio en la pelicula es provocado por un corto circuito los incendios del word trade center se concentraron en los asbestos tubos de ventilacion y computadores avivados por el aire y los cortos circuitos no tiene ningun misterio h ciencia entender lo que sucedio ese dia nadie imaginaba que todos esos incendios este video esta explicado todo jimmy hernandez😮😮😮
@@joedoe-sedoe7977There have been independent investigations of the collapses, minus the NIST.
Building 7 was hit by debris from the collapse of the north tower. The owner saying pull it, in the context of his his quote means nothing. Unless you think the fire department was in on the plot.
Es nervt mich dass ich den Endtext nicht lesen kann.
Er wird verdeckt von nächsten Video vorschlägen.
Sind beim Bau Personen gestorben?
Entschuldigung dafür! Ich werde versuchen, die Textplatzierung in zukünftigen Videos zu verbessern. Was Ihre Frage betrifft, ja, leider haben mehrere Arbeiter während des Baus des World Trade Centers ihr Leben verloren. Die Sicherheitsstandards verbesserten sich zu dieser Zeit, aber es war immer noch ein gefährlicher Job.
@@3dcasuallearning schon gut, ich hatte dadurch schon die Vermutung das beim Bau schon leben verloren ging.
Das erinnert mich an die Titanic. Bei deren Bau starben auch schon so einige.
Ich hab mich eh gefragt wie es nur möglich war diese enorm hohen Wolkenkratzer zu bauen.
Ich war 6 Jahre alt als sie zerstört wurden zusammen mit so vielen Leben.
Unglaublich was der Mensch alles erschaffen aber zur gleichen Zeit wiederum zerstören kann.
9:27 We’re just gonna not even mention the Other Mechanical floors ?
@@mrandrossguy9871 which one
Thanks for watching! 😊 The other mechanical floors are actually mentioned at 5:35 if you want to revisit that part. Let me know if there’s anything specific you’d like more info on!
@@Siddu457 I mean there’s like 4 mechanical floors one at the bottom two in the middle and a nother at top
Oh yah@@mrandrossguy9871
@@3dcasuallearning perhaps more detail information needed, that gave the two towers the famous visible "band"... at first i thought it's the sky lobby because it gave the sense there were two open wide floors just like the main lobby.. but later i was corrected that it was the mechanical floors, and it didn't featured windows like other floors.. but appreciate your video, because as english is not my first language, i did find hard to find the definiition of "slurry walls", and your video explains it better...
Remember me when you become famous!🥰😊✅👨💻👍
Of course! 😄 I'll never forget the early supporters like you! Thanks for being part of the journey!
2001💀☠️
i didnt waste 150 mill on a apt. no u didnt it was money well spent
Exactly! 😄 Every penny counts when it's spent on something worthwhile! Thanks for stopping by!
And we were too cowardly and corrupt to build them Back to Avenge the Fallen !
Thank you for sharing your thoughts. Rebuilding after a tragedy sparked many emotions and viewpoints, and ultimately, the decision to create the new WTC was seen by many as a tribute to resilience and remembrance. While the new design is different, it was shaped to honor those we lost and to serve as a symbol of renewal for New York City and beyond.
@@3dcasuallearning And it does a terrible job as it tries to make you forget the Original Center and its Symbolism and Purpose, therefore disrespecting the fallen and that SHOULD be on Everyone’s mind.
Thank you for replying.
While it may feel different to many, it was intended to be a space for reflection, unity, and moving forward. It’s always important to remember the original towers’ significance, and your comment is a great reminder of that.
@@mrandrossguy9871Don’t forget about the fountains of where the 2 towers used to be. The fountains of the two towers honor people who have died in the collapse, even stating their names. So, they did NOT do a terrible job.
@@3dcasuallearningI think it’s very controversial, but if they weren’t going to rebuild the towers exactly as they stood but taller, I am relatively happy with the current design. Riding down the West Side Highway Bikepath and seeing Freedom tower is always beautiful. Even if I was not able to witness the original towers in the skyline. Thank you for the very informative video.
What is the meaning of Ground Zero?
: the point directly above, 🔔below🔔, or at which a nuclear explosion occurs🔔
Ground Zero refers to the site directly where a significant event occurred, like a disaster or explosion. In the case of 9/11, it’s the area where the World Trade Center towers stood before they collapsed.
@@3dcasuallearning substitution of concepts
@@3dcasuallearning the introduction of a new term to justify the original truthful meaning
@@3dcasuallearning the introduction of a new term to justify the original truthful name
I hope this comments pop up
As you wish Thanks for commenting!
This video is very Melancholic through all the times New York had it's peace and wars, Never forget 🩷
Thank you for your comment. New York has certainly seen its share of triumphs and tragedies, and the history of the World Trade Center is a powerful reminder of both.