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Six, the core columns fell after the collapse of the floor systems.
originally posted by: Salander
a reply to: EraTera2
Not only did the buildings fall, some mysterious force ejected massive pieces laterally hundreds of feet.
Curious minds want to know why.
Uncurious minds are oblivious to physics.
originally posted by: democracydemo
a reply to: neutronflux
Six, the core columns fell after the collapse of the floor systems.
Based on what fact not yet debunked?
You keep obsessing with this false claim. As it is the key driver for global natural collapse for both towers you can not it to be false.
I can understand and feel your passion in this matter, but the admit nothing, deny everything atmosphere you create leaves you blind to what is actually observed.
Core first, rest follows.
9/11 and the Science
of Controlled Demolitions
www.skeptic.com...
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.
WTC 1 core collapse
m.youtube.com...
Visible core columns
www.dailymotion.com...
World Trade Centre Core Collapsing
m.youtube.com...
9/11 Footage shows core of both towers standing; Debunks Basement BombsTheory
m.youtube.com...
Mechanics of Twin Towers' collapse
en.m.wikipedia.org...
The lower portions of both buildings' cores (60 stories of WTC 1 and 40 stories of WTC 2) remained standing for up to 25 seconds after the start of the initial collapse before they too collapsed.[44]
originally posted by: neutronflux
POST REMOVED BY STAFF
originally posted by: mrthumpy
originally posted by: neutronflux
a reply to: democracydemo
True or False. For WTC 1 and WTC 2, after the complete collapse of their floor systems, there were still core columns standing?
I'm going with True
originally posted by: democracydemo
originally posted by: neutronflux
a reply to: democracydemo
Why do you post falsehoods that damage your credibility?
Credability: "the fact that someone can be believed or trusted". Quotes from Wikipedia [44] and skeptic.com. Is this credability?
Are visual, actual, real-world, true observations false?
Yes or No?
9/11 and the Science
of Controlled Demolitions
www.skeptic.com...
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.
originally posted by: neutronflux
a reply to: democracydemo
Please state how the below is a lie concerning the twin towers.
9/11 and the Science
of Controlled Demolitions
www.skeptic.com...
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.
All you are doing is making yourself look sad and killing your own credibility.
9/11 and the Science
of Controlled Demolitions
www.skeptic.com...
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.
Failure of Welded Floor Truss Connections from the Exterior Wall during Collapse of the World Trade Center Towers
app.aws.org...
Analysis of the connections supporting the composite floor system of the WTC towers showed that at and below the im- pact floors, the greater majority (above 90%) of the floor truss connections were either bent downward or completely re- moved from the exterior column. This was probably related to the overloading of the floors below the impact region after col- lapse initiation. Depending upon weld joint geometry, detachment of the main load-bearing seats was a result of either fracture in the heat affected zone of the base material (standoff plate detached from spandrel) or through the weld metal (seat angle detached from standoff plate). Failure in both cases was assumed to be a result of a shear mechanism as a result of overloading from floors above impacting those below. There did not appear to be a significant change in distribution of failure modes of the floor truss connections when comparing those connections inside vs. outside of the impact region or those ex- posed to pre-collapse fires and those that were not.
app.aws.org...
the greater majority (above 90%) of the floor truss connections were either bent downward or completely re- moved from the exterior column.
originally posted by: neutronflux
a reply to: democracydemo
If the vertical columns did not fall after the failure of the floor system, how did the below take place?
app.aws.org...
the greater majority (above 90%) of the floor truss connections were either bent downward or completely re- moved from the exterior column.
en.m.wikipedia.org...
The lower portions of both buildings' cores (60 stories of WTC 1 and 40 stories of WTC 2) remained standing for up to 25 seconds after the start of the initial collapse before they too collapsed.[44]
From video evidence, significant portions of the cores of both buildings (roughly 60 stories of WTC 1 and 40 stories of WTC 2) are known to have stood 15 to 25 seconds after collapse initiation before they, too, began to collapse. Neither the duration of the seismic records nor video evidence (due to obstruction of view caused by debris clouds) are reliable indicators of the total time it took for each building to collapse completely.
originally posted by: mrthumpy
originally posted by: neutronflux
a reply to: democracydemo
True or False. For WTC 1 and WTC 2, after the complete collapse of their floor systems, there were still core columns standing?
I'm going with True
9/11 and the Science
of Controlled Demolitions
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.
WTC 1 core collapse
m.youtube.com...
Visible core columns
www.dailymotion.com...
World Trade Centre Core Collapsing
m.youtube.com...
9/11 Footage shows core of both towers standing; Debunks Basement BombsTheory
m.youtube.com...