The Serious 9/11 Arguments Compilation.

neutronflux NIST model of WTC7 collapse does not work. You guys are so blinded by the official narrative that you think its non issue they removed stiffness and safeguard fittings on the girder at column 79. This is cheating you have to model what will happen with the shear studs, web plate and fasteners attached.

You only have to observe the rate of collapse to notice that NIST allowed 20+ second for all the floors to come down inside the building.

You guys going to claim the WTC7 actual collapse video is fake? You clearly see it only took 6 to 7 seconds once the Penthouse went in for the right wall on the west wall to start moving downwards. That a clear sign of demolition/ If floors were removed at a faster pace of time.

a reply to: Jesushere

Here is the video of WTC 7

9/11: WTC 7 Collapse (NIST FOIA, CBS video)
m.youtube.com...

Remember, the claim is the resistance of each column had to be removed floor by floor to achieve the witnessed rate of collapse. Is that false

Please point to any evidence of thermobaric weapons or planted demolitions creating any of the following to cut exterior columns floor by floor.

Fireballs.
Ejecting material out windows from charges cutting steel.
Audio evidence of a CD system cutting columns floor by floor.
The ejection of splintered columns.
Flashing and sparking of charges setting off.
Charges creating a pressure waves with the force to cut steel.
Thermal imaging of charges burning through steel.

And how a split second timed sophisticated CD system maintain its integrity after WTC 7 sustained damage from the collapse of the Twin Towers and hours of uncontrolled fires.

And how nobody noticed individuals installing charges on WTC 7’s columns floor by floor before 9/11.

Impossibly upon impossible to get the CD system to work. With zero evidence steel was worked on by demolitions.

originally posted by: neutronflux
a reply to: Jesushere

Here is the video of WTC 7

9/11: WTC 7 Collapse (NIST FOIA, CBS video)
m.youtube.com...

Remember, the claim is the resistance of each column had to be removed floor by floor to achieve the witnessed rate of collapse. Is that false

Please point to any evidence of thermobaric weapons or planted demolitions creating any of the following to cut exterior columns floor by floor.

Fireballs.
Ejecting material out windows from charges cutting steel.
Audio evidence of a CD system cutting columns floor by floor.
The ejection of splintered columns.
Flashing and sparking of charges setting off.
Charges creating a pressure waves with the force to cut steel.
Thermal imaging of charges burning through steel.

And how a split second timed sophisticated CD system maintain its integrity after WTC 7 sustained damage from the collapse of the Twin Towers and hours of uncontrolled fires.

And how nobody noticed individuals installing charges on WTC 7’s columns floor by floor before 9/11.

Impossibly upon impossible to get the CD system to work. With zero evidence steel was worked on by demolitions.

What you not noticing in all this is the floors collapsing in the NIST model are causing deformations of the walls and the exterior face is deshaping.

Do you see that occurring in the actual collapse, be honest?

The video of the actual collapse proves NIST wrong as we should be seeing these same deformations when the floors are collapsing and when the building descended!

My best guess here and we only conclude this based on whats noticeable The bang was the internal structural columns at the very top got removed. As you see only a few windows got smashed on the east side. That likely the area of where the columns were placed. On the east side, they underneath the Penthouse. The Penthouse came through that empty shell, a kink in the middle occurred or, resulted, then the building started to decent through that empty space from the top down.

I unsure about this part that line that ran up the right side could be columns being removed, but the most likely it was due to the pressure of downward force when the building was going down to the ground?

Remember, the claim is the resistance of each column had to be removed floor by floor to achieve the witnessed rate of collapse. Is that false

Yes, that's false Freefall only occurred on some floors estimated to be about 8 floors. I don't believe any truther claimed all columns were demolished at the same time.

It's the falling section that crushes the bottom part. That what you expect to see in a natural collapse. A demolition is a falling section coming through meeting no resistance beneath and crushing the bottom

originally posted by: Jesushere
Remember, the claim is the resistance of each column had to be removed floor by floor to achieve the witnessed rate of collapse. Is that false

Yes, that's false Freefall only occurred on some floors estimated to be about 8 floors. I don't believe any truther claimed all columns were demolished at the same time.

It's the falling section that crushes the bottom part. That what you expect to see in a natural collapse. A demolition is a falling section coming through meeting no resistance beneath and crushing the bottom

Again, quote NIST where thet said there was no resistance?

If the columns were buckled below the eighth floor of the section of the facade that reached the rate of free fall accelerate, it would offer negligible resistance.

The facade is right there in the video. There are no audible pressure waves with the force to cut steel columns. There is no flashing and sparking from the exterior columns. Charges that supposedly cut columns would show visible blowouts on the section of wall along the exterior columns. There is no splintered steel being ejected from the windows in the section of wall along the exterior columns.

The building as a whole fell slower than the acceleration of free fall.

It’d doesn’t mater if NIST only came close in what they clearly state is their theory. Fire related collapse is backed by two other studies.

What you don’t get is there is ZERO evidence of planted demolitions at the WTC. And there have been partial and full fire related collapse of steel high rises buildings.

Again,
Here is the video of WTC 7 again

9/11: WTC 7 Collapse (NIST FOIA, CBS video)
m.youtube.com...

Remember, the claim is the resistance of each column had to be removed floor by floor to achieve the witnessed rate of collapse, and the witnessed SYMMETRY. Is that false

Please point to any evidence of thermobaric weapons or planted demolitions creating any of the following to cut exterior columns floor by floor.

Fireballs.
Ejecting material out windows from charges cutting steel.
Audio evidence of a CD system cutting columns floor by floor.
The ejection of splintered columns.
Flashing and sparking of charges setting off.
Charges creating a pressure waves with the force to cut steel.
Thermal imaging of charges burning through steel.

And how a split second timed sophisticated CD system maintain its integrity after WTC 7 sustained damage from the collapse of the Twin Towers and hours of uncontrolled fires.

And how nobody noticed individuals installing charges on WTC 7’s columns floor by floor before 9/11.

Impossibly upon impossible to get the CD system to work. With zero evidence steel was worked on by demolitions.

A reply to: waypastvne

Waypastvne, my tens of years old computer screen has passed away. I was quite attached to it, so I will try to repair it.
So, I first had to get me another one. That's one reason it took me so long, and it took then quite some more time, to prove you wrong.

From my posted, second German spoken video :

Controlled Demolition of 116 meters high rise (AfE Tower) in Frankfurt 02.02.2014 - Full HD, Slow Motion & Crashcam.
On 02.02.2014 at 10:04 clock the AfE Tower in Frankfurt was blown up.
950 Kg of explosives were needed to bring the building to collapse, which was built in 1972.
With 116 meters it was the tallest building that was blown up in Europe to date.
The demolition was carried out by Reisch blasting and went according to plan. The video shows footage from the Marriott Hotel, (LT: and) also in slow motion, and from a courtyard at the Goethe University.

NOTE that all the shown slow motion video in those two videos I posted, the English spoken one and the German spoken one, is having slowed sound too, see the 02:20 position in the German spoken video.!
It's only stretched out. That's why you hear in that German spoken video, those 5 demolition sounds over a 2 x longer period, since the video then is shown in 2x slower motion.
You also see the window oscillate 2 x slower in the first, 8 secs slow motion part of the first, English spoken video. And the sound of its 5 demolition charges going off, is also at a 2x slower pace.
See my next post, its first video link, an officially aired video, ALSO in GERMAN, with solid evidence for the same 5 real time demolition sounds, as in my first posted, English spoken video.

waypastvne : Top video the count down is in English.

Yep. Because that's filmed from another room as in the second German spoken video, as you clearly can see.
Since the 2 left sides in those two different videos show quite different parts of the cladding on that building's left side, outside that CLOSED "English"window, and outside the other "German" room's OPEN window.
And, if you look at the right bottom part, the L-shaped whitish building in that corner shows up at a different angle in the second video.
In that closed off room the occupants were listening to a radio that aired the countdown in English from a Frankfurt radio station that broadcasts in English for the tens of thousands of British and American soldiers stationed on that huge military airfield near Frankfurt.
They listened to a radio broadcast with their radio. In a room with closed doors and a closed, double pane glass window.

waypastvne : Bottom video the count down is in German.

Yep. Because there you hear nearby the OPEN window, or even from its balcony, in the open air, a radio that is tuned in to a broadcast in German for all the neighbors and spectators. And also aired over speakers on the ground.
So, that was a local German radio station, that recorded the event for its German radio listeners.
The hissing sounds you hear in the German one, are probably the effects of their radio reporter his overexposed microphone.
And if you listen really concentrated, with good earphones, you also hear those 5 demolition charges go off in this video, but they nearly drown in the collapse sounds.

waypastvne : The top video, the sound track is dubbed in.

Don't think so....It's just the difference between a camera microphone behind a closed double paned glass window in a closed off room , and another camera microphone behind or beneath an open window or open balcony door, both clearly filmed from different rooms in the Marriott Hotel.
In the English spoken video, the original 4 secs, REAL TIME, low pitched 5 demolition sounds from the second part of that video, you hear 2x slower in the first shown 8 secs slow motion part. And that's the Slow Pro's slow motion repeat.
See my next post its first video, with solid evidence of those 5 real time demolition sounds.

waypastvne : Bottom video has the original sound and some really loud bangs.

Yep. Because that second German video its first 4 secs real time building front part collapse, was recorded also with a Go Pro slow motion capable camera through or beneath an open window or open balcony door, then the second part of it, by another, now crash-cam camera in open air at a courtyard at the Goethe University. And its third part is the slow motion part of that video, with slowed sound.
While the other, first, English spoken video was also shot by a slow motion capable Go Pro camera, in another, but closed-doors and closed windows room.
And showed with another Go Pro camera, the blasting first in real time with real time sounds, from behind a closed windows/doors setting, then a second part in slow motion, with 2x slowed sounds .

In the second German spoken video, the camera's microphone got over exposed by the sheer volume and pitch of the very loud open air sounds, while that didn't happen in the first video, and that's why you hear in that first one, the more distinct, 5 separate explosions, since that closed double paned window performed as a sound suppressing baffler "blanket".

In the first English spoken video its first 8 secs slow motion part, you clearly see and hear how the explosions fit the spitting out of the dust.
The first 2 combined charges sound like one, and the other 4 separate sounding charges also fit their individual explosive dust clouds, in this first video its first, slow-motion part. This means that the slow-motion camera software registers the sound also in slow-motion.
And when you compress its original slow-motion film and sound and let it play 2 times faster, thus showing the real time event, then it compresses the sound also 2 times.

It takes in the slow motion first part of the first English video, 8 slow motion seconds to let the front part of the building disappear in the bottom dust cloud.
The second part is the one in real time, played by the same slow motion camera, however sped-up 2 times by its Go Pro video-player, thus compressed to 4 secs duration of descent in that slow motion camera software.
In that second part of that first, English spoken video, the Go Pro Slow Motion camera delivers 2x slowed sound in those 8 seconds, while it offers the real time sound in the next, original 4 secs real time recording.

Other camera angles, in the open.

Frankfurt Uni Turm gesprengt "Uni-Hochhaus" ( AfE-Turms - Mega-Knall )
www.youtube.com...


06:16 Here is the evidence, waypastvne, that it, like in my first English spoken posted video, indeed first were 2 higher up detonations (nearly identical and overlapping), followed by 3 others, lower down.
And certainly not the very loud 2 boooms that you hear in the following 4 other videos of the same event...
07:41 to 08:24 : Repeated, but now in SILENT slow motion.
Note please that the German reporter indicates, that first the outer shell is blasted, and then the inner core. Like in the Twin Towers...

Sprengung des AfE-Turm in Frankfurt [Uni-Turm in Schutt und Asche] -Größte Sprengung in Europa-
www.youtube.com...
01:38 One loud and one softer booom. In the open. Quite different.

Note that the muffler blankets indicate the spots where the demolition charges are situated.
At the bottom a whole row of charges on the vertical columns, at 12 m the crucial corner and two center vertical columns, and at 28 m, the same.
In WTC7, the 9/11 planners chose to use a few heavy TB charges at the bottom levels, and one or two higher up, which they detonated 8.3 seconds earlier, to topple the two penthouses full of heavy equipment into the 46th and even lower floors.
Or they just installed normal cutter charges on column 79 and its adjacent beams and girders, since NIST "proved" to us that that was all they needed to do to bring WTC7 down.
Simple job. Walk in, fix those copper lined cutter charges on both sides of those beams and the same for column 79, attach the radio controlled detonation devices, and walk away.
Well, I think they used quite a more complicated manner of demolition, if you weigh in all we nowadays know.

Professor Hulsley et al, have handed over to their peers from solid European Journals, their now 6 new papers.
Around Christmas or New Year, when there are no crucial objections from their 6 peers, they will go public with their honestly fitting animations, that really resemble the real time videos of the WTC7 collapse. And show how they did it...
And not that crappy NIST animation, from which they withheld all their data points on which they based that stupid animation that lasts a mere 2 seconds. National security reasons...childish reason. As we all know too well.

Sprengung Uniturm Frankfurt (AfE-Turm) 02.02.2014 in HD mit Zoom auf Stockwerk mit Sprengstoff
www.youtube.com...
02:01 One quite loud demolition sound, then one much less loud. In the open, at street level. Quite different again.

Drohne AfE Hochhaus Sprengung Frankfurt 02.02.2014 spektakuläre Aufnahmen Dji Phantom
www.youtube.com...
01:20 Three quite loud boooms. In the open. 01:40 Slow motion, during which the sound is not interrupted, so, this slow-motion has no sound.
Quite different again.

Frankfurt: Sprengung AfE-Turm: Sicht vom Main Tower
www.youtube.com...
02:20 One loud, one less loud booom. No sight because of fog. Filmed in the open from the 200 m high Main tower.
Quite different, since fog (myriads of tiny water drops), muffles most sounds quite well.

Waypastvne, don't you have anything to say about this :

That it definitely wasn't an internally started, naturally occurring avalanche in WTC7, by the failure of that fat steel column number 79 as NIST proposed, is quite eloquently proven by the SAE measurements of WTC7 its measured descent curves, proven by Charles M.Beck in his WTC7 paper, recent revision 4 :
arxiv.org...

a reply to: LaBTop

Again. The claim by the truth movement has always been the resistance of the WTC buildings had be removed column by column and floor by floor to achieve the witnessed rates of collapse and witnessed symmetry.

Please post video and audio evidence of detonations with the power to cut columns from the WTC.

a reply to: LaBTop

For NIST supposedly being so wrong, funny the truth movement is gravitating towards smaller and single point failures for the WTC? Is that what you are implying? Only took about 17 years? The Truth movement keeps changing it’s stories? To chase the NIST model? Because the NIST model fits the video, audio, and photographic evidence.

And there is still ZERO physical, video, audio, and seismic proof of planted charges at the WTC.

a reply to: LaBTop

When you going to spend more time on the WTC 7 collapse video than a building in Germany to validate evidence of WTC 7 planted charges? Or you just going to keep posting long winded distractions?

The sagging trusses 2002 theory...re-lived and unearthed by, sigh..., neutronflux...Need I say more?

Obviously yes. Just read my thread posts on page 121 again :
www.abovetopsecret.com...

In this post of mine, posted on Sept 10, 2016 @ 18:50, so, TWO years ago already, I had explained the only logical and possible reason (human intervention) why those two WTC1N corner rows of PERIMETER columns bowed inwards, to both sides of one distinct floor line.
Additionally enforcing that reason, is the moving down action of the radio mast on top of the hat truss of WTC1N, only slightly earlier than the start of the global collapse of WTC1N.

If the sagging trusses theory were true, and thus the central core was kept fully intact, that radio mast plus the hat truss should have been the sole inward bowing enforcing force on all the perimeter columns around that building. Consequently, that radio mast should have moved clearly downwards, slowly over the full period of 22 minutes, which it did not. It suddenly sank down 0.50 m and more, just a second before global collapse followed.

Read all of my posts there on that page 121, regarding that inward bowing of a horizontal line of perimeter columns, at both towers, many minutes (WTC1 : 21 min, WTC2 much shorter) before their global collapses started.

And then imagine how the 9/11 planners designed for the outside situated public eye, their seemingly gravitational collapses :

Quite some outer CORE columns, including their 4 quite stronger corner CORE columns, must have been severed diagonally under a 60 degree upward angle along the base and top of just one CORE floor, by relatively small cutter charges.
F.ex. radio controlled, discus shaped explosion-fronts engineered, thermobaric charges. Or radio controlled, standard 2001 era, copper filled cutter charges, installed in fire resistant boxes around these inner CORE columns.

Then the dead weight from the top part (radio mast, hat truss and upper floors) were forcing all of them SLOWLY to slide off OUTWARDS over the remaining CORE column stumps at the floor its bottom, over a maximum downward height of 8 ft (2.44 m).
Thus, that's a sinking trajectory of the nr.1000 row of outer CORE columns over a PART of the height of ONLY ONE CORE floor, until global collapse followed.

And these UPPER parts of cut, outer CORE columns, began thus acting like a slow splitting wedge, that pushed these top parts, over the small width of a bottom floor its cut CORE column stump, slowly outwards. Then, the further those columns sunk, the steeper the downward angle of their attached floors became, which then caused these huge and strong composite floors and their many underlying, STILL STRAIGHT pairs of trusses to pull their attached perimeter columns 52 inch (1.22 m) maximum inwards.
Until global collapse started, when the inward bowing became too much for the remaining strength on these floors of the 2 buildings, on and under those floors, to uphold the total top part mass.

files.abovetopsecret.com...


Notice the best evidence in the above image. Multiple floor lines are pulled inwards by the still intact composite floors and their underlying pairs of trusses.
We see, in the inward bowing video, also SEVERAL distinct floor lines their perimeter walls are caving in, ABOVE the initiating floor lines :

the-pre-collapse-inward-bowing-of-wtc2.t4760 - thread at metabunk.org
From this post on, and onward, it gets interesting (of course it's just a sagging aluminum lowered ceiling front, not a sagging floor, since the trusses there, were running parallel to the perimeter columns, so how on earth could they ever pull on that perimeter, even if they all HAD indeed sagged ? Bazant : Impossible.! ) :
The pre-collapse inward bowing of WTC2

www.metabunk.org...


This above animated GIF picture shows clearly what happened.
Several floor-lines their PERIMETER walls caved in, above the initiation floor its bottom, where the CORE cutter charges were situated.
Therefore, it shows as good as conclusive evidence of an explosive source for the multiple floor line cave-ins, in both towers.

-snip- That happened at WTC-1N after 3 huge fireballs at 09:59 a.m. emanated from a row of windows at the middle and East side of the North tower's South facade, at the same moment that the adjacent tower (WTC-2S) visibly starts to collapse.
These 3 spots were in the center of the positions where the inward bowing became visible in photos and videos, after seven more minutes passed. -snip-

OS-believers keep asking for proof of demolition.
That's a sure sign of it at the North Tower, those 3 huge fireballs at 09:59 a.m.

Now, of course the logical question would be to ask :
Where is the evidence for these 3 huge fireballs, I mentioned in my post number 21227956 on my thread's page 121?

Well, just scroll down a few posts....on my thread's page 121.
And YES, click my post, since THERE it is......
Then, just CLICK the first link in that post of mine, and you will read this :

9:59 Three large fireballs emerge from the middle and east side of the south perimeter (LT: of WTC1N) as WTC2 starts to collapse. These locations mark the center of where IB (LT: InwardBowing) will be visible after a few more minutes. Two clips which highlight the ejections:

www.youtube.com...

www.youtube.com...

10:06 Southward leaning and IB are first reported.
IB increases to a maximum measured 55 inches (1.397 m) over 22 minutes (this would require about 9 feet (2.743 m) of floor sagging to attain).
The NIST's own fire simulations do not provide excessive heat for the slabs to create such bowing as seen in this gif:
femr2.ucoz.com...

(LT : Note the lower temperatures at the later times, closer to collapse, displayed in this time laps, while the higher temperatures, those red/orange colored ones are not at the IB spots)

10:28 Building collapses. The NIST claims that floor sagging pulled in the south perimeter to the point of failure. The south wall failure overloads the core, causing progressive column failures from south to north over a tilt of 8 degrees.
In reality, all core and perimeter columns have failed with minimal tilt. Both the antenna and north wall had tilted less than 1 degree during the entire column failure sequence. All columns have failed by this moment: (view the photo in the article).

The range of tilt during the collapse initiation sequence is determined HERE.
Perhaps the cause of the IB has more to do with the large fireballs that emerge from the center of the IB region only a few minutes before IB was first reported?

NIST mentions the fire ejections briefly:
NCSTAR1-5, Page 15 : "Very shortly after the collapse began, fire and smoke were pushed out of the south face of WTC 1, probably due to a pressure pulse transmitted to WTC 1 from the collapsing tower. The most prominent effect was on the 98th floor where flames were pushed out of windows along the west side of the face."

Probably? It is not hard to verify this so why guess? There is smoke coming from the south face around this region and we can see no movement due to the collapsing tower within the smoke. Any wind pulse transmitted from WTC2 to WTC1 would be visible within movement of the veil of smoke covering the south wall of WTC2.
Also, the (LT : flame and smoke) ejections come from the center and east side as anyone can see, not the west side.

What do you OS Trusters have to say about that ?

These are two other videos, about the inconceivable, unthinkable sagging truss theory (according to prof. Bazant) .
NISTPART1 (9:23) no audio.
www.youtube.com...

Comment by 74pbg - 5 years ago :
Anyone ever think about the work was already done with the initiation of the collapse???
Look in this video or imagine, how much the floors must have sagged to pull the perimeter inward? These floors below impact were already cooled down as they begin to"sagg"!
I was standing on Church Street off the South Tower, and the "Explosion sounds" were all BEFORE the tower came down!

Its additional follow-up video :
NISTPART2 (5:31) no audio.
www.youtube.com...


See 5:21/5:31. It were the core columns that were compromised, and then slowly pulled the trusses down with them under the burden of the dead load of the top tower part. Those strong pairs of trusses, still straight under intact composite floors, also pulled those perimeter walls inwards. That's what happened.
As Major_Tom also explained. He provided additional evidence, by showing videos of those 3 huge fireballs spitting out just where a few minutes later that inward bowing began.

There's your evidence of explosions in the WTC Towers, that started the demolition of both. Seems to me to have been cutter charges that cut the 4 much stronger core-corner columns, which, per piece, held up far more dead weight than the other outer and inner core columns. And some 3 outer core columns to both sides of these corner columns.
Then the sturdy top hat truss construction inside the few upper floors divided also a part of the dead weight to the perimeter columns on all four sides, which aided also in the inward bowing that slowly followed after the initial breach of those 4 core-corner columns. And then the two tower tops leaned, followed by their global collapses.

The fact that we see several floor lines worth of perimeter columns bowing inward, means that those outer-core columns were severed all at the same heights in the towers.
Otherwise we would have seen a bulging inwards of many more lines of floors at their perimeter facades. The 9/11 planners must have cutter-charged those columns diagonally, to let them, under the dead load weights from above, slid slowly downwards over their still sturdy standing, lower column parts.
Conclusive Evidence of that :

Explaining Inward Bowing Through Partial Core Failure.

And thus it was utterly necessary for the 9/11 planners and executors, to hastily disappear all those (except two) compromising vertical steel column pieces from both towers their plane impacted and fire engulfed floors, and especially the core columns from the collapse-initiation floors !
Conclusive Evidence of that :

NIST preserved only TWO core column pieces from WTC1N and WTC2S their plane-impacted, fire indulged floors, and none from their collapse initiation floors. And NONE at all from WTC-7..... And eventually preserved steel by their predecessor investigations ( FEMA, 9/11 Commission) from those floors, was also gone at the time NIST went in.
Thus, you will not find photos nor videos of that crucial vertical steel evidence from those just as crucial floors, ever.
Except those measly three pieces, which of course don't give a clue what really happened up there.
Which is highly suspicious on itself, and strongly indicates high level corporation and aid to the 9/11 planners.
Especially when you remember, that NO steel AT ALL from WTC7 was preserved. Only that sulfur attacked "Swiss cheese" piece by FEMA, for which I can't find any depository institution, yet. Seems lost. Perhaps the NY Times knows its whereabouts ?

READ and VIEW the whole argumentation and evidence in those two links. Then comment eventually.
So none from the serious 9/11 researchers, that stood up against the far too fast offered official explanation, had any chance to inspect in any neutral, controlled manner, those CRUCIAL steel pieces, they were for ever gone in blast furnaces in China and India.
This is against many of the investigative directives for such an immense criminal attack on US soil.
And this behavior in the first months after 9/11 reveals how deeply controlled that US Administration was, since it allowed the 9/11 planners to remove vital, crucial evidence on such a scale.
And up to this very day, they keep covering their, and their own backs.

Later on in the following global collapse, we saw the "Spire" still standing, when the collapsing floors front already long passed it.
That spire was not composed of core columns, as so many here believe after repeatedly have been bombarded with posts, calling the spire core columns. It was a long piece of perimeter corner column with some adjacent perimeter columns and Vierendeel parts, still attached.
Then, after a few seconds, those remaining perimeter corner columns suddenly dumped STRAIGHT down.
While you would expect them to topple over, in a natural collapse sequence.

THE important question here is, what happened to those lowest, really thick perimeter columns and its corner perimeter column, causing that gracious sinking into itself of the last standing "Spire"? Why on earth didn't these column parts topple over to one side, or split to many sides.? They disappeared from sight as if an express elevator went down.

And then a few more analytical cad/cam videos, from the same perfectionist video maker :

WTC Finite Element Analysis (9:39)
www.youtube.com...


Make that last picture of a box with an atomic bomb in it, just a thermobaric bomb...
And do note the transverse trusses that ran perpendicular to the double trusses.

WTC Core (8:05)
www.youtube.com...


The pictures at the end, of the diagonally cut steel columns were not from the crucial floors, and can as easily have been cut by crews after the collapses. Therefore it's not defendable, we do not have time stamped pictures of such steel cuts, where for sure no acetylene cutter crews were present on the WTC steel debris heaps.

wtc_build1 (6:07)
www.youtube.com...


In the above video, you can see the construction details of WTC7.
And its build up to completion. As a structural animation.

WTC1 and WTC2 (7:52)
www.youtube.com...


That's quite a simplification of both collapses of the Twin Towers.

a reply to: LaBTop

No fireballs for WTC 7?

From what. The collapsing buildings pushing air out and carrying flames along with it from the office fires.

With no audible evidence of pressure waves with the force to cut steel from detonations?

With the vertical columns left standing in the wake of the floor collapse in the collapse of the twin towers. And the collapse of the twin towers was not through the path of greatest resistance.

You are delusional, and grasping at any falsehood you and push.

a reply to: LaBTop

Fire balls are evidence of air being pushed out by collapsing sections of building.

Please provide proof of pressure waves from planted explosives with the force to cut columns.

It’s sad to see you dance around there is no proof of planted explosives at the WTC.

No proof they could be planted secretly.

With zero possible the CD system would survive the jet impacts that breached elevator shafts, cut elevator cables, cut building services like fire water. And survive the wide spread fires.

And that vertical columns of the twin towers were lefts standing in the wake of the floor system collapse.

a reply to: LaBTop

Look at me. I am LapTop. I going to post page after page of trash to avoid honest debate. Push everyone’s reasonable response and questions into the background.

a reply to: LaBTop

If fireballs were proof of explosives cutting columns, why did AE invent the fizzle no flash explosives fantasy?

And where are the fireballs for WTC 7?

a reply to: LaBTop

Do you mean this as no evidence of steel being cut on the debris pile.







Cuts to core columns done during steel removal.