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9/11: How did nobody predict the towers would collapse?
11-14-2023, 08:15 AM
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#31
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Originally Posted By SirFapsAIot⏩
You can see the little explosions at various levels going off as it falls. It's in the loose change 911 documentaryI remember the morning it happened, saw firefighters being interviewed LIVE saying that they had to haul ass out of the buildings because they heard demo charges going off.
11-14-2023, 08:19 AM
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#32
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Originally Posted By GaryRidgway⏩
Hello SilversteinWas anyone else 12 and didn't give a chit when it happened?
***Disclaimer: All posts made by [2011change] are works of satire and made for entertainment use only.***
11-14-2023, 08:30 AM
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#33
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Originally Posted By pondus_levo⏩
fypbecause they were litterally designed to withstand airplane impact.
just maybe not a 747 full of fuel.just maybe not a 747 full of fuel.just maybe not a controlled demolition.
just maybe not a 747 full of fuel.just maybe not a 747 full of fuel.just maybe not a controlled demolition.
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11-14-2023, 08:41 AM
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#34
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building 7 going down like that is quite telling.
11-14-2023, 08:45 AM
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#35
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Originally Posted By cobhc⏩
merely a mathematical approximation of physical realityFuarkkk, the collapse is consistent with nonlinear analysis, srs.
11-14-2023, 08:52 AM
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#36
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Originally Posted By Jms89⏩
3 buildings dropped perfectly into their basements that day. That statistic alone should tell you it was certainly planned and rigged. Do you often experience 3 six sigma events in one day. Think to yourself how unlikely is it that one of the towers could perfectly fall into it's basement given that it was slammed with a plane - when pulling that feat off usually takes month's of planning. Now how ****ing likely is it that 3 of these events happened in the same day with differing impacts & variables. 1/100000000000000 perhaps is the answer. In other words, the **** was rigged.Conspiracy bois should watch this... one of the reasons i became a civil engineer was because of witnessing 9/11 when i was a kid. I wanted to understand Statics, building systems, etc. This guy does a good job explaining the physics behind it. I love conspiracy theories, and i don't buy the official story, but i do not believe the building was rigged.There is so much that goes into rigging a building for demolition, i can't imagine it would go undetected.Building 7 is the more fishy story, especially with that being a huge office for the Feds. Also, Larry Silverstein is sketchy AF.
Anyone who has a basic understanding of stats should be able to tell you the official story is horse ****. The question is what is the real story.
11-14-2023, 08:56 AM
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#37
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[QUOTE=Jms89 post_id=1693345033]Conspiracy bois should watch this... one of the reasons i became a civil engineer was because of witnessing 9/11 when i was a kid. I wanted to understand Statics, building systems, etc. This guy does a good job explaining the physics behind it. I love conspiracy theories, and i don't buy the official story, but i do not believe the building was rigged. There is so much that goes into rigging a building for demolition, i can't imagine it would go undetected. Building 7 is the more fishy story, especially with that being a huge office for the Feds. Also, Larry Silverstein is sketchy AF.
[youtube]1NkBfLBov5Q?si=at0wCU_0uOoSdBsl[youtube][/QUOTE]People there heard many explosions right before the collapse
You can see glass blowing out right before they collapse
Civilian getting interviewed right after talking about the explosions
Many people who talked about the explosions are missing
Building 7 wasn't even touched yet it came down exactly like a controlled demolition
[youtube]1NkBfLBov5Q?si=at0wCU_0uOoSdBsl[youtube][/QUOTE]People there heard many explosions right before the collapse
You can see glass blowing out right before they collapse
Civilian getting interviewed right after talking about the explosions
Many people who talked about the explosions are missing
Building 7 wasn't even touched yet it came down exactly like a controlled demolition
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11-14-2023, 08:58 AM
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#38
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Originally Posted By ChinkWithDink⏩
Naw, in order to get a controlled demolition like that you'd have to really carefully place explosives at very difficult to reach areas and the quantity would be pretty significant. That steel frame was tough and over designed.merely a mathematical approximation of physical reality
It all comes down to stiffness, moment of inertia and length of columns with all three being dependent on temperature in extreme situations. Thermal expansion + increased vibration of atoms meant that those columns would buckle easily.
I'm just not participating in this thread because I still think everyone should be skeptical of gov about everything. I can't tell you much about the other buildings but there's nothing strange about the collapse of the twin towers.
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11-14-2023, 09:01 AM
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#39
Originally Posted By cobhc⏩
I agree that of all the things that happened that day, the towers collapsing is the LEAST fishy.Naw, in order to get a controlled demolition like that you'd have to really carefully place explosives at very difficult to reach areas and the quantity would be pretty significant. That street frame was tough and over designed.
It all comes down to stiffness, moment of inertia and length of columns with all three being dependent on temperature in extreme situations. Thermal expansion + increased vibration of atoms meant that those columns would buckle easily.
I'm just not participating in this thread because I still think everyone should be skeptical of gov about everything. I can't tell you much about the other buildings but there's nothing strange about the collapse of the twin towers.
It all comes down to stiffness, moment of inertia and length of columns with all three being dependent on temperature in extreme situations. Thermal expansion + increased vibration of atoms meant that those columns would buckle easily.
I'm just not participating in this thread because I still think everyone should be skeptical of gov about everything. I can't tell you much about the other buildings but there's nothing strange about the collapse of the twin towers.
building 7
no pentagon footage, no pentagon wreckage, the "plane" hitting a section of the pentagon that was vacated for renovations
flight 93 being shot down instead of the hokey "lets roll" story
all>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>towers collapsing the way they did.
but that being said if you are willing to doubt any of the story, you have to doubt all of the story.
11-14-2023, 09:04 AM
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#40
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Originally Posted By cobhc⏩
Sorry bruh, has to be rigged. Consider how impossibly difficult it would be to accidentally make 3 towers all fall straight into their basement. You couldn't do it in a billion tries. Had to be planned and executed. Common sense prevailing: we'll never know the real story, but the official story is complete trash simply using common sense.Naw, in order to get a controlled demolition like that you'd have to really carefully place explosives at very difficult to reach areas and the quantity would be pretty significant. That street frame was tough and over designed.
It all comes down to stiffness, moment of inertia and length of columns with all three being dependent on temperature in extreme situations. Thermal expansion + increased vibration of atoms meant that those columns would buckle easily.
I'm just not participating in this thread because I still think everyone should be skeptical of gov about everything. I can't tell you much about the other buildings but there's nothing strange about the collapse of the twin towers.
It all comes down to stiffness, moment of inertia and length of columns with all three being dependent on temperature in extreme situations. Thermal expansion + increased vibration of atoms meant that those columns would buckle easily.
I'm just not participating in this thread because I still think everyone should be skeptical of gov about everything. I can't tell you much about the other buildings but there's nothing strange about the collapse of the twin towers.
11-14-2023, 09:05 AM
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#41
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Originally Posted By Retoaded⏩
All I can tell you is that politicians exploited the fears of Americans and empowered a tyrannical force in our government. Never have American liberties been stomped on that badly - they knew what they were doing.I agree that of all the things that happened that day, the towers collapsing is the LEAST fishy.
building 7
no pentagon footage, no pentagon wreckage, the "plane" hitting a section of the pentagon that was vacated for renovations
flight 93 being shot down instead of the hokey "lets roll" story
all>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>towers collapsing the way they did.
but that being said if you are willing to doubt any of the story, you have to doubt all of the story.
building 7
no pentagon footage, no pentagon wreckage, the "plane" hitting a section of the pentagon that was vacated for renovations
flight 93 being shot down instead of the hokey "lets roll" story
all>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>towers collapsing the way they did.
but that being said if you are willing to doubt any of the story, you have to doubt all of the story.
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11-14-2023, 09:08 AM
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#42
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Originally Posted By FinBra⏩
I only did research on the twin towers so no comment on the other stuff but if you ran that analysis a billion times with a computer or by hand, the collapse would be the same.Sorry bruh, has to be rigged. Consider how impossibly difficult it would be to accidentally make 3 towers all fall straight into their basement. You couldn't do it in a billion tries. Had to be planned and executed. Common sense prevailing: we'll never know the real story, but the official story is complete trash simply using common sense.
If you were expecting it to tip over, or fall on its side then that wouldn't make sense because the columns get stronger as you approach the foundation and gravity vector is what it is. The floor beams would fail from the sheer energy of impact after impact which would shear the bolts/welds connecting to the columns and leave them completely unstable.
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11-14-2023, 09:13 AM
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#43
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The Zionist had to do something to steal trillions of American tax dollars to fight their wars in the Middle East.
As
11-14-2023, 09:13 AM
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#44
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Originally Posted By cobhc⏩
I expect at least some differing - especially with regards to 7 (I understand the structure of 7 versus the other 2 was entirely different). The collapsing floors around the central elevator core theory leaves a lot to be desired on 1 & 2 IMO.I only did research on the twin towers so no comment on the other stuff but if you ran that analysis a billion times with a computer or by hand, the collapse would be the same.
If you were expecting it to tip over, or fall on its side then that wouldn't make sense because the columns get stronger as you approach the foundation and gravity vector is what it is. The floor beams would fail from the sheer energy of impact after impact which would shear the bolts/welds connecting to the columns and leave them completely unstable.
If you were expecting it to tip over, or fall on its side then that wouldn't make sense because the columns get stronger as you approach the foundation and gravity vector is what it is. The floor beams would fail from the sheer energy of impact after impact which would shear the bolts/welds connecting to the columns and leave them completely unstable.
The acceleration at the speed of gravity is another classic common sense issue that holds up ones belief on the collapsing/pancake theory. Floors collapsing should take time, it shouldn't drop as if I let go of an apple from my hand (but sure enough, all 3 did).
11-14-2023, 09:22 AM
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#45
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Originally Posted By FinBra⏩
I mean, if it matters at all to you, I'm a pretty well known high-rise steel frame specialist in NYC.I expect at least some differing - especially with regards to 7 (I understand the structure of 7 versus the other 2 was entirely different). The collapsing floors around the central elevator core theory leaves a lot to be desired on 1 & 2 IMO.
The acceleration at the speed of gravity is another classic common sense issue that holds up ones belief on the collapsing/pancake theory. Floors collapsing should take time, it shouldn't drop as if I let go of an apple from my hand (but sure enough, all 3 did).
The acceleration at the speed of gravity is another classic common sense issue that holds up ones belief on the collapsing/pancake theory. Floors collapsing should take time, it shouldn't drop as if I let go of an apple from my hand (but sure enough, all 3 did).
Steel framed floor collapse is progressive if you're pushing the area load it was designed for (too many people, starting a library, using it for heavy storage). The beams will deflect and you'll know that they're being pushed to their elastic limit where steel becomes even stronger once it enters plastic deformation.
It's not progressive when bolts and welds around the perimeter shear from massive amounts of kinetic energy.
Steel columns and beams fail progressively and with warning, steel connections typically do not.
You may be thinking that these steel members were ripping and releasing the floors below - that rarely, if ever, happens with steel. It's an incredible material.
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11-14-2023, 09:25 AM
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#46
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all i know is that they either allowed it to happen or did it themselves
i won't larp about having a deep knowledge of controlled demolitions and how towers should normally fall
i won't larp about having a deep knowledge of controlled demolitions and how towers should normally fall
11-14-2023, 09:32 AM
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#47
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Originally Posted By cobhc⏩
Good to speak with someone in the industry on this. You're effectively saying that the pancake theory holds given the failing of the perimeter welds/fasteners, etc. But any failing/snapping etc, should provide at least some resistance (even if not a lot) on the way down. So I'd expect to see the the buildings accelerating down at like 8m/s^2 (finger in the air as an example) rather than 9.81 m/s^2.I mean, if it matters at all to you, I'm a pretty well known high-rise steel frame specialist in NYC.
Steel framed floor collapse is progressive if you're pushing the area load it was designed for (too many people, starting a library, using it for heavy storage). The beams will deflect and you'll know that they're being pushed to their elastic limit where steel becomes even stronger once it enters plastic deformation.
It's not progressive when bolts and welds around the perimeter shear from massive amounts of kinetic energy.
Steel columns and beams fail progressively and with warning, steel connections typically do not.
You may be thinking that these steel members were ripping and releasing the floors below - that rarely, if ever, happens with steel. It's an incredible material.
Steel framed floor collapse is progressive if you're pushing the area load it was designed for (too many people, starting a library, using it for heavy storage). The beams will deflect and you'll know that they're being pushed to their elastic limit where steel becomes even stronger once it enters plastic deformation.
It's not progressive when bolts and welds around the perimeter shear from massive amounts of kinetic energy.
Steel columns and beams fail progressively and with warning, steel connections typically do not.
You may be thinking that these steel members were ripping and releasing the floors below - that rarely, if ever, happens with steel. It's an incredible material.
As an actuary, I usually don't even get into the material collapse component of this conspiracy. My statistical understanding of such an event usually stops me from even having to go that far. IE, 3 buildings all in their basement in one day, allegedly without prep, JFL. Its not a coincidence that my education/profession can entertain.
11-14-2023, 09:33 AM
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#48
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Originally Posted By ninetynine8⏩
You're probably not wrong.all i know is that they either allowed it to happen or did it themselves
i won't larp about having a deep knowledge of controlled demolitions and how towers should normally fall
i won't larp about having a deep knowledge of controlled demolitions and how towers should normally fall
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11-14-2023, 09:39 AM
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#49
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Originally Posted By FinBra⏩
I'm not sure what the pancake theory is but the gravitation acceleration of the collapsed materials would be a constant 32.2 ft/sGood to speak with someone in the industry on this. You're effectively saying that the pancake theory holds given the failing of the perimeter welds/fasteners, etc. But any failing/snapping etc, should provide at least some resistance (even if not a lot) on the way down. So I'd expect to see the the buildings accelerating down at like 8m/s^2 (finger in the air as an example) rather than 9.81 m/s^2.
As an actuary, I usually don't even get into the material collapse component of this conspiracy. My statistical understanding of such an event usually stops me from even having to go that far. IE, 3 buildings all in their basement in one day, allegedly without prep, JFL. Its not a coincidence that my education/profession can tolerate.
As an actuary, I usually don't even get into the material collapse component of this conspiracy. My statistical understanding of such an event usually stops me from even having to go that far. IE, 3 buildings all in their basement in one day, allegedly without prep, JFL. Its not a coincidence that my education/profession can tolerate.
Every single floor that collapses increases the kinetic energy SIGNIFICANTLY and even though the columns get stronger and stronger as you approach the footings (as well as perimeter moment frame girders), the floor beams do not. They are sized entirely on deflection for expected use so if you have an office on the 2nd floor, and and office on the 70th floor, they'd have the same floor framing members. They aren't sized to carry the floor above because the loads from the floor above are transferred to columns.
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11-14-2023, 09:43 AM
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#50
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Originally Posted By cobhc⏩
in english pls cobhcI'm not sure what the pancake theory is but the gravitation acceleration of the collapsed materials would be a constant 32.2 ft/s
Every single floor that collapses increases the kinetic energy SIGNIFICANTLY and even though the columns get stronger and stronger as you approach the footings (as well as perimeter moment frame girders), the floor beams do not. They are sized entirely on deflection for expected use so if you have an office on the 2nd floor, and and office on the 70th floor, they'd have the same floor framing members. They aren't sized to carry the floor above because the loads from the floor above are transferred to columns.
Every single floor that collapses increases the kinetic energy SIGNIFICANTLY and even though the columns get stronger and stronger as you approach the footings (as well as perimeter moment frame girders), the floor beams do not. They are sized entirely on deflection for expected use so if you have an office on the 2nd floor, and and office on the 70th floor, they'd have the same floor framing members. They aren't sized to carry the floor above because the loads from the floor above are transferred to columns.
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11-14-2023, 09:44 AM
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#51
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Originally Posted By cobhc⏩
When this event hapepend back in the day, I was all over it because it smelt so bad. Here is a quick read up on what the theory was:I'm not sure what the pancake theory is but the gravitation acceleration of the collapsed materials would be a constant 32.2 ft/s
Every single floor that collapses increases the kinetic energy SIGNIFICANTLY and even though the columns get stronger and stronger as you approach the footings (as well as perimeter moment frame girders), the floor beams do not. They are sized entirely on deflection for expected use so if you have an office on the 2nd floor, and and office on the 70th floor, they'd have the same floor framing members. They aren't sized to carry the floor above because the loads from the floor above are transferred to columns.
Every single floor that collapses increases the kinetic energy SIGNIFICANTLY and even though the columns get stronger and stronger as you approach the footings (as well as perimeter moment frame girders), the floor beams do not. They are sized entirely on deflection for expected use so if you have an office on the 2nd floor, and and office on the 70th floor, they'd have the same floor framing members. They aren't sized to carry the floor above because the loads from the floor above are transferred to columns.
NIST's findings do not support the "pancake theory" of collapse, which is premised on a progressive failure of the floor systems in the WTC towers (the composite floor system—that connected the core columns and the perimeter columns—consisted of a grid of steel "trusses" integrated with a concrete slab; see diagram). Instead, the NIST investigation showed conclusively that the failure of the inwardly bowed perimeter columns initiated collapse and that the occurrence of this inward bowing required the sagging floors to remain connected to the columns and pull the columns inwards. Thus, the floors did not fail progressively to cause a pancaking phenomenon.
The official theory out of the 9/11 commission put forward the pancake theory. NIST couldn't back it, and came up with a different theory. Link here
https://www.nist.gov/world-trade-cen...-investigation
You'll have to ctr F 'pancake' to find that passage.
EDIT:Not necessarily sure this will change anything you've said, but that was the 'official theory' until NIST came out and **** on it (not saying they're correct either, FYI).
11-14-2023, 09:46 AM
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#52
11-14-2023, 09:51 AM
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#53
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Originally Posted By FinBra⏩
There was no progressive failure anywhere.When this event hapepend back in the day, I was all over it because it smelt so bad. Here is a quick read up on what the theory was:
NIST's findings do not support the "pancake theory" of collapse, which is premised on a progressive failure of the floor systems in the WTC towers (the composite floor system—that connected the core columns and the perimeter columns—consisted of a grid of steel "trusses" integrated with a concrete slab; see diagram). Instead, the NIST investigation showed conclusively that the failure of the inwardly bowed perimeter columns initiated collapse and that the occurrence of this inward bowing required the sagging floors to remain connected to the columns and pull the columns inwards. Thus, the floors did not fail progressively to cause a pancaking phenomenon.
The official theory out of the 9/11 commission put forward the pancake theory. NIST couldn't back it, and came up with a different theory. Link here
https://www.nist.gov/world-trade-cen...-investigation
You'll have to ctr F 'pancake' to find that passage.
NIST's findings do not support the "pancake theory" of collapse, which is premised on a progressive failure of the floor systems in the WTC towers (the composite floor system—that connected the core columns and the perimeter columns—consisted of a grid of steel "trusses" integrated with a concrete slab; see diagram). Instead, the NIST investigation showed conclusively that the failure of the inwardly bowed perimeter columns initiated collapse and that the occurrence of this inward bowing required the sagging floors to remain connected to the columns and pull the columns inwards. Thus, the floors did not fail progressively to cause a pancaking phenomenon.
The official theory out of the 9/11 commission put forward the pancake theory. NIST couldn't back it, and came up with a different theory. Link here
https://www.nist.gov/world-trade-cen...-investigation
You'll have to ctr F 'pancake' to find that passage.
The initiation of the collapse was 100% the result of buckled columns being pulled inwards.
But as you got further toward the foundation the combined mass of everything would start annihilating bolts/welds while pulling columns in.
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11-14-2023, 09:52 AM
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#54
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Originally Posted By cobhc⏩
Are you saying the jet fuel melted the steal beams?There was no progressive failure anywhere.
The initiation of the collapse was 100% the result of buckled columns being pulled inwards.
But as you got further toward the foundation the combined mass of everything would start annihilating bolts/welds while pulling columns in.
The initiation of the collapse was 100% the result of buckled columns being pulled inwards.
But as you got further toward the foundation the combined mass of everything would start annihilating bolts/welds while pulling columns in.
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11-14-2023, 09:53 AM
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#55
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Originally Posted By cobhc⏩
Which is why you should never believe your government's official account, as I'm sure you wouldn't. Because clearly that **** was entirely wrong.There was no progressive failure anywhere.
The initiation of the collapse was 100% the result of buckled columns being pulled inwards.
But as you got further toward the foundation the combined mass of everything would start annihilating bolts/welds while pulling columns in.
The initiation of the collapse was 100% the result of buckled columns being pulled inwards.
But as you got further toward the foundation the combined mass of everything would start annihilating bolts/welds while pulling columns in.
11-14-2023, 09:54 AM
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#56
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Originally Posted By GaryRidgway⏩
No.Are you saying the jet fuel melted the steal beams?
Intense heat reduced the stiffness of all components layered on top of structural damage from a jet hitting a ton of components.
Originally Posted By FinBra⏩
lol @ trusting themWhich is why you should never believe your government's official account, as I'm sure you wouldn't. Because clearly that **** was entirely wrong.
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11-14-2023, 10:02 AM
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11-14-2023, 10:03 AM
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11-14-2023, 10:12 AM
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#59
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Originally Posted By cobhc⏩
You clearly know what you are talking about. So are you saying that the jet fuel deformed the steel beams which caused the bolted connections to fail and that releases the whole floor to fall straight down?I mean, if it matters at all to you, I'm a pretty well known high-rise steel frame specialist in NYC.
Steel framed floor collapse is progressive if you're pushing the area load it was designed for (too many people, starting a library, using it for heavy storage). The beams will deflect and you'll know that they're being pushed to their elastic limit where steel becomes even stronger once it enters plastic deformation.
It's not progressive when bolts and welds around the perimeter shear from massive amounts of kinetic energy.
Steel columns and beams fail progressively and with warning, steel connections typically do not.
You may be thinking that these steel members were ripping and releasing the floors below - that rarely, if ever, happens with steel. It's an incredible material.
Steel framed floor collapse is progressive if you're pushing the area load it was designed for (too many people, starting a library, using it for heavy storage). The beams will deflect and you'll know that they're being pushed to their elastic limit where steel becomes even stronger once it enters plastic deformation.
It's not progressive when bolts and welds around the perimeter shear from massive amounts of kinetic energy.
Steel columns and beams fail progressively and with warning, steel connections typically do not.
You may be thinking that these steel members were ripping and releasing the floors below - that rarely, if ever, happens with steel. It's an incredible material.
And that can happen with multiple floors simultaneously?
This invalidates the theory that states floors should have fallen progressively and progressing no faster than g?
Am I understanding that right?
I would like to put out there that I trust your science, but it only demonstrates that burning jet fuel could have produced a collapse like that. It does not prove that it did cause the collapse because other causes could produce the same result.
Do you have any thoughts on the footage of what looks like molten metal, possibly thermite, ejecting from the buildings immediately before collapse?
Or the photos of beams that appear to have been intentionally cut in a straight line by melting?
11-14-2023, 10:14 AM
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#60
Originally Posted By FinBra⏩
Just wondering so do you believe the 2020 election was rigged because wasn't it like 1 in a quadrillion chance P3do Joe would pull it out on election night?Good to speak with someone in the industry on this. You're effectively saying that the pancake theory holds given the failing of the perimeter welds/fasteners, etc. But any failing/snapping etc, should provide at least some resistance (even if not a lot) on the way down. So I'd expect to see the the buildings accelerating down at like 8m/s^2 (finger in the air as an example) rather than 9.81 m/s^2.
As an actuary, I usually don't even get into the material collapse component of this conspiracy. My statistical understanding of such an event usually stops me from even having to go that far. IE, 3 buildings all in their basement in one day, allegedly without prep, JFL. Its not a coincidence that my education/profession can entertain.
As an actuary, I usually don't even get into the material collapse component of this conspiracy. My statistical understanding of such an event usually stops me from even having to go that far. IE, 3 buildings all in their basement in one day, allegedly without prep, JFL. Its not a coincidence that my education/profession can entertain.
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