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Originally posted by billybob
Originally posted by HowardRoarkto recap, a little louder, .......only a SMALL FRACTION of the energy from the collapsing towers was converted into GROUND MOTION. the GROUND SHAKING that resulted from the collapse was EXTREMELY SMALL.
Well, even if that is true, as Roark said, the collapse still accounts for the 2 largest spikes on the graph presented.
Originally posted by taibunsuu
I wouldn't go by the graph, because it's not definitive. Should the spikes be largest at the beginning of collapse or the end of the collapse? This can be argued.
What's more definitive, are the things actually caught on tape, and nature of the melting steel. As linked above, the industrialists who certified the steel used in the WTC have stated in legal documents that the steel isn't going to melt unless its temperature is raised far higher and for far longer than could have been possible in the towers.
Anyway, there's a lot more definitive subjects to talk about besides the graph. I haven't mentioned the graph because unlike the tapes of the incidents, we didn't see it being composed, and there's tons of other evidence that's more definitive but is left untouched.
The graph arguments are almost as bad as the cruise missile in the Pentagon theory.
Originally posted by Frosty
Who said the steel needed to be melted into a liquid state in order to lose strength?
The steel needs enough heat applied to it to lose it's support, burning jet fuel is perfectly acceptable for this purpose.
Why fly planes into the building when you already have a sub-level demolition charge set to tear the building down?
And why would it collapse at the point where the planes impacted and not where the bombs were placed?
To state that the acctual collapse never showed significance on the graph is ill-ogic.
Nobody
Read the link above featuring a letter from the industrial company certifiying the strength of WTC structure steel.
Its a lot easier to imagine a plot in which plane impacts take down towers than terrorists performing a controlled demo with a couple tons of explosives. And, the plane impacts can always explain the collapse of the towers.
Gives the impression that the plane impacts caused the demolition.
I think people who talk about the graph are arguing that both the demolition and the impact are registering.
If it took 10 seconds for the building to collapse, wouldn't the largest spikes be at the end of the ten-second shakeup?
Originally posted by Frosty
Originally posted by billybob
to recap, a little louder, .......only a SMALL FRACTION of the energy from the collapsing towers was converted into GROUND MOTION. the GROUND SHAKING that resulted from the collapse was EXTREMELY SMALL.
Well, even if that is true, as Roark said, the collapse still accounts for the 2 largest spikes on the graph presented.
I think people need to watch this video here very carefully.Not for the hoopla or the sad imagery,but to study it.Watch closely to actual video from that day.Listen to actual radio and TV broadcasts as it was happening.
Originally posted by SMR
Man,this will never end will it.Oh well,it's fun.
First off,I believe Howard said there were many fires in the building.
That is false and has been documented.There were 2 fires.One was on the 7th floor,the other on the 12th.They were two controlled pockets.
Yet the report says these 2 fires brought it down on it's footprint Impossible.
But then we have a statement made by many,that it was pulled.And no not the firemen being pulled out,but the building being 'pulled' as in DEMO style.
Let me quote Dan Rather - "...... a building was deliberately destroyed by well placed dynomite to knock it down"
So which is it?Did fire bring it down or explosives?Contradicting statements from the same people is not very trusting now is it?
As for the towers,
Melting point of steel 1535°C
Max temp of non-pressurized hydrocarbon fire ~825°C
Difference of ~710°C
Feb 23 1991 One Meridian Plaza burned out of control for 18hrs on several floors,,,,it did not collapse.
There were two isolated pockets of fire that caused all 287 columns to weaken and bring down a tower in a telescoping manner?
Now granted a plane damaged much of the floors that they entered.But is it enough to weaken that area and cause a collapes?
If it was indeed so damaged,would it not have just toppled to the side dropping off after maybe taking out say,10 floors at most below it?
I find it hard to believe that the top halfs were equal enough in damage to drop straight down.At one point it would have started leaning to the side.
Atleast 3/4 of one building would have been left standing and the other,perhaps 1/2 to 3/4 left standing.
The lower halves are still very strong to withstand some weight and cause the tops to lean and break off.
The only way the bottom half would be so weak is if they were weakened by something.
If you watch video of the towers falling,you may notice that the floors start buckling before the top half reaches them.Almost 15 floors below.But not only that,they pop out.What causes that?Wouldnt it just shred downward and crumble AS the top half was coming down on it?
Now what about the 'explosions' that can be seen in video.Anyone see these puffs of smoke thrusting outward BEFORE the collaps even starts?
Not only that,but several spaced out and not many of them.They look like charges being set off to weaken the structure.
I cant get my prit scr to work right on video so sorry on the lack of photo images.
One report said that reports of explosions took place 1 hour after the plane hit the south tower.
I think people need to watch this video here very carefully.Not for the hoopla or the sad imagery,but to study it.Watch closely to actual video from that day.Listen to actual radio and TV broadcasts as it was happening.
I firmly believe that explosives other than the planes were used in the collapse of 3 towers on 9-11-2001
So since we're debating what took down the 3 WTC buildings, name a single building besides them that's a steel structure collapsed by fire.
Originally posted by Frosty
So since we're debating what took down the 3 WTC buildings, name a single building besides them that's a steel structure collapsed by fire.
I'll answer this for everyone: can't think of one at the moment as there is no evidence for this every occuring. Ok, now answer this: Name one steel structure besides WTC and Pentagon that had a commercial jumbo jet equiped with 10,000 gallons of jet fuel ram into it?
One Meridian Plaza is a 38-story high-rise office building.
The building is rectangular in shape, approximately 243 feet in
length by 92 feet in width (approximately 22,400 gross square feet), with
roughly 17,000 net usable square feet per floor. (See Appendix A for floor
plan.) Site work for construction began in 1968, and the building was
completed and approved for occupancy in 1973.
Construction was classified by the Philadelphia Department of
Licenses and Inspections as equivalent to BOCA Type 1B construction
which requires 3-hour fire rated building columns, 2-hour fire rated
horizontal beams and floor/ceiling systems, and l-hour fire rated corridors
and tenant separations. Shafts, including stairways, are required to be 2-
hour fire rated construction, and roofs must have l-hour fire rated
assemblies.
The building frame is structural steel with concrete floors poured
over metal decks. All structural steel and floor assemblies were protected
with spray-on fireproofing material. The exterior of the building was
covered by granite curtain wall panels with glass windows attached to the
perimeter floor girders and spandrels.
The building utilizes a central core design, although one side of the
core is adjacent to the south exterior wall. The core area is approximately
38 feet wide by 124 feet long and contains two stairways, four banks of
elevators, two HVAC supply duct shafts, bathroom utility chases, and
telephone and electrical risers.
Unprotected penetrations in fireresistance
rated assemblies and the
absence of fire dampers in ventilation
shafts permitted fire and smoke to
spread vertically and horizontally.
Steel looses much of its strength long before it reaches its melting point.
That is why they apply fireproofing to steel. Fireproofing is not there to keep the steel from burning , it is there to insulate the steel from the high temperature of the fire.