It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Thank you.
Some features of ATS will be disabled while you continue to use an ad-blocker.
originally posted by: turbonium1
Prove that any structure can collapse entirely in almost a free fall, from only random fires and random damage, while about 2/3 of the lower structure in perfectly intact....
I've never seen it before, so if you claim it's possible, then you must SHOW it's possible....
originally posted by: neutronflux
originally posted by: turbonium1
Prove that any structure can collapse entirely in almost a free fall, from only random fires and random damage, while about 2/3 of the lower structure in perfectly intact....
I've never seen it before, so if you claim it's possible, then you must SHOW it's possible....
If you cannot link to an example of a high rise building over 50 stories being brought down by explosive charges/thermite before 9/11, that makes CD at the towers impossible?
I quoted various cases of building “spontaneously” collapsing from being overloaded.
The Madrid Windsor had a complete collapse of the structural steel above the 17 floor if I remember right. The complete collapse of the building was only stopped by the concrete core, which the WTC did not have. The Tehran high rise collapse was a complete collapse initiated by fire.
MADRID FIRE REPORT PRAISES CONCRETE'S PERFORMANCE
www.architectsjournal.co.uk...
A survey of the fire-damaged structure of the Windsor Tower, Madrid, concluded that the concrete structure 'performed extraordinarily well in a severe fire'. The study, 'Fire in the Windsor Building, Madrid: Survey of the Fire Resistance and Residual Bearing Capacity of the Structure after the Fire', was carried out by the Instituto Technico de Materiales y Construcciones. It concluded that the 'need for - reproofing of steel members to guarantee their performance in the event of - re was recon-rmed'
-Break-
Structural failure happened with the collapse of the steel perimeter columns and the oor slabs collapsing as this edge support was taken away. The massive concrete transfer slab at the 20th oor prevented further progressive failure. The Concrete Centre is funding further research into the behaviour of the tower's concrete structure at the University of Edinburgh.
The Windsor Tower Fire, Madrid
www.mace.manchester.ac.uk...
The fire protection on the existing steelworks below the 17th floor had been completed at the time of fire except for the 9th and 15th floors. When the fire spread below the 17th floor, those protected perimeter columns survived, except for the unprotected columns at the 9th and 15th floors which all buckled in the multiple floor fire (see Figure 2). However, they did not cause any structural collapse. Obviously, the applied loads supported by these buckled columns had been redistributed to the remaining reinforced concrete shear walls. Nevertheless, structural fire analysis should be carried out before such a conclusion can be drawn.
On the other hand, the reinforced concrete central core, columns, waffle slabs and transfer structures performed very well in such a severe fire. It is clear that the structural integrity and redundancy of the remaining parts of the building provided the overall stability of the building.
By: turbonium1
www.abovetopsecret.com...
The 1/3 top section of the structure loses all support at the same time, and drops down onto the lower 2/3 of the structure, which still remains completely intact.
That is the point when magically, 'collapse is inevitable'.
No. You CLAIM it is inevitable. So what? It's just another worthless claim.
www.merriam-webster.com...
Topple
to fall from or as if from being top-heavy
www.merriam-webster.com...
Collapse
1 :to fall or shrink together abruptly and completely :fall into a jumbled or flattened mass through the force of external pressure a blood vessel that collapsed
2 :to break down completely :disintegrate
originally posted by: turbonium1
None of the steel collected by NIST was weakened by fires to the point of any failure.
So why do you keep claiming steel was exposed to fires which caused failure, from fires that NEVER caused any steel to weaken to the point of failure?
It's pure nonsense.
What about proving it is even possible?
Nothing built can replicate the collapse, and never will.
Could you ever build a structure, and then collapse it, the same way?
No.
originally posted by: turbonium1
originally posted by: wmd_2008
a reply to: turbonium1
Tell the families of the construction workers killed on this site that a top down collapse of ONE floor cannot make it to groung level or stfu !
Skyline Towers collapse
It is concluded that the improper removal of forms supporting the 23rd floor resulted in increased shear force around the columns. The recently poured concrete had not yet reached its full strength capacity and was unable to withstand these increased forces. Therefore, the trigger mechanism of the collapse was shear failure around a number of columns on the 23rd story. Without the support of these columns, other columns on that story were overstressed which ultimately led to the collapse of the entire 23rd floor slab onto the floor below. The increased loading on the 22nd floor from the weight of the collapsed floors above was too great and led to a progressive collapse all the way to the ground level
So if you don't really know how things work don't comment
It didn't completely collapse, first of all.
What is the comparison to the twin towers, or WTC 7, all 3 of which DID completely collapse?
. Without the support of these columns, other columns on that story were overstressed which ultimately led to the collapse of the entire 23rd floor slab onto the floor below. The increased loading on the 22nd floor from the weight of the collapsed floors above was too great and led to a progressive collapse all the way to the ground level
originally posted by: Salander
a reply to: MalfunctionJunction
Tim binLaden and his gang of merry men were fall guys for the inside job that was 911.
originally posted by: neutronflux
The truth movement lied. The towers did not fall through the path of greatest resistance. Long sections of vertical columns stood whole seconds after the complete collapse of the floor system for each tower.
The truth movement lied. The towers did not fall at the rate of free fall. The floor system of the towers fell at 2/3rds the rate of free fall. The vertical columns fell at a rate slower than the floor system at 40 percent the rate of free fall.
originally posted by: turbonium1
originally posted by: neutronflux
The truth movement lied. The towers did not fall through the path of greatest resistance. Long sections of vertical columns stood whole seconds after the complete collapse of the floor system for each tower.
The truth movement lied. The towers did not fall at the rate of free fall. The floor system of the towers fell at 2/3rds the rate of free fall. The vertical columns fell at a rate slower than the floor system at 40 percent the rate of free fall.
To address two points you posted awhile back..
A few slivers of vertical columns somehow are evidence that all the core columns were slower to collapse than the rest of the structure. Brilliant logic!
The slivers didn't collapse 'whole seconds' later. THEY DIDN'T COLLAPSE UNTIL THEY CLEARED UP ALL THE DEBRIS, DAYS LATER. As images prove.
As for the speed of collapse, it was NOT 2/3 free fall speed. There is no valid evidence to support that claim. A few pieces left of inner column steel didn't even collapse, so that's a nonsensical argument. The seismic records don't indicate how long it took to collapse, in any way. This assumes no explosions went off before the collapses, or anything caused spikes in the sub-basement floors. It is absurd.
WTC 7 offers us adequate measurements of it's collapse speed, and proves it is nearly free fall speed.
This is measuring how long it took the 47 floors to collapse. Not when the little penthouse collapsed, and the pause after it collapsed. That is nonsense.
By that incredible logic, if part of the structure is demolished 20 minutes before the rest of it, in a CD, then it would have taken over 20 minutes to collapse, so it could not have been a CD.
Any excuse at all, right?
9/11 and the Science
of Controlled Demolitions
BY CHRIS MOHR
www.skeptic.com...
3WHAT ABOUT THE ALMOST FREE-FALL COLLAPSE OF THE TWIN TOWERS? The key is the “almost” modifier. If I told you I was making almost $100,000 and you found out I was making only $67,000, you’d say I was exaggerating. So stop exaggerating the collapse speed of the WTC Towers! The 80,000 tons of structural steel slowed down the collapses of the Twin Towers to about ⅔ (two-thirds) of free-fall.3 And the core collapsed at about 40% of free-fall speed, coming down last.4 According to Richard Gage: “To bring a building symmetrically down, what we have to do is remove the core columns.” But on 9/11 the stronger core columns came down last, which violates this supposed most fundamental rule of controlled demolition.