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No, wrong again, they said there was eutectic reactions that caused intergranular melting, not melted beams....
The severe corrosion and subsequent erosion of Samples 1 and 2 are a very unusual event. No clear explanation for the source of the sulfur has been identified. The rate of corrosion is also unknown. It is possible that this is the result of long-term heating in the ground following the collapse of the buildings. It is also possible that the phenomenon started prior to collapse and accelerated the weakening of the steel structure.
In Bailey's Crossroads, VA, a large apartment complex called Skyline Plaza was under construction. Workers were busy pouring concrete on an apartment building in the complex and at 2:30pm on March 2, 1973, a large progressive collapse occurred in the center of the building, collapsing each floor from the top down. The root cause of the problem is said to be due to the premature removal of forms and shoring for slabs in the vicinity and specific columns on the 23rd floor. Four key concrete columns along with the concrete slab did not reach their desired strength and failed, causing the floor above to collapse onto the floor below, bringing a large center portion of the structure to the ground.
those on here that cant understand a progressive collapse here we go
originally posted by: andr3w68
a reply to: _BoneZ_
If this guy is saying it's a false flag, and that it was brought down on purpose, how can anyone who wasn't there still argue that it wasn't. This is a man who has been trained in fighting fires saying that the fires in that building were not enough to bring it down. ITS SO OBVIOUS! The truly amazing thing is just how may people still don't even know that there was a third building collapse on that day.
all three building COMPLETELY collapsed from little initial damage and no supporting evidence the FIRES PRESENT assisted......lol...again, what doers pathetically pointing to that building do for ya....no really!!!!!
a reply to: Answer
He's a firefighter, not a structural engineer. I'm sure he's great at putting out fires Ho but nobody knows what actually happened inside the towers where the planes impacted.w much of the internal structure was destroyed? How much was damaged and weakened by fire? Was there enough undamaged structure to bear the weight of the upper floors? All the "experts" I've seen referenced by the 9/11 conspiracy nuts are stating an opinion based on very little evidence.
but nobody knows what actually happened inside the towers where the planes impacted.w much of the internal structure was destroyed? How much was damaged and weakened by fire? Was there enough undamaged structure to bear the weight of the upper floors?
originally posted by: hgfbob
a reply to: wmd_2008
those on here that cant understand a progressive collapse here we go
including you.....[shakes head]
why are you linking to a gutted building????...from the words..."progressive collapse"?
lol....WHAT does that do for ya.....
and then you proceed to describe a 'construction accident'?....AGAIN, what does that do for ya???????
you seem to be mistaken.....9-11 was GLOBAL collapse x3
all three building COMPLETELY collapsed from little initial damage and no supporting evidence the FIRES PRESENT assisted......lol...again, what doers pathetically pointing to that building do for ya....no really!!!!!
Wind design relies on additional structural members and wind tunnel tests. Current fire design relies on very simple, single element tests and adding insulating material to the frame. Thermal induced forces are not
calculated or designed for
LITTLE damage just as well YOU have nothing to do with construction then isn't it.
Progressive collapse is what happened with the Towers once the areas above imapct dropped GAME OVER!
YES that can go all the way to ground level.
Again your lack of knowledge and ignorance shines like a beacon
As for the FIRES there are are a whole range of documents available to download and read many of which even YOU would understand
"No conclusive evidence was found to indicate that pre-collapse fires were sever enough to have a significant effect on the microstructure that would have resulted in weakening of the steel structure." NIST NCSTAR 1-3C, p. 235
no evidence the type of joining methods, materials, or welding procedures used was improper NIST 1-3 p.99
recovered bolts were stronger than typical. NIST 1-2 p.133
"no core column examined showed temp. above 250C" NIST 1-3 6.6.2
NCSTAR1-3 7.7.2 "because no steel was recovered from WTC7,it is not possible to make any statements about it's quality"
You say LITTLE damage and fire were not a problem explain this then.
above the impact point drop what was a static load is now a DYNAMIC load.
As for claims that WTC 7 fires stopped if you watch the videos at the point of collapse guess what you still see smoke rising from the building.
Before these events THERMAL loading on a structure due to fire was NOT given the same attention as wind or seismic loading, assumptions were made
all that changed after 9/11
"our analysis indicated the biggest problem would be the fact that all the fuel would dump into the building. [But] the building structure would still be there."
"The buildings have been investigated and found to be safe in an assumed collision with a large jet airliner (Boeing 707—DC 8) traveling at 600 miles per hour. Analysis indicates that such collision would result in only local damage which could not cause collapse or substantial damage to the building and would not endanger the lives and safety of occupants not in the immediate area of impact."
-- John Skilling, City in the Sky
The "little" damage according to truthers reminds me of this....
To build on this and to refresh people's memories, Bill Manning, editor in chief of Fire Engineering magazine, said the following about the "official" investigation:
"Fire Engineering has good reason to believe that the "official investigation" blessed by FEMA and run by the American Society of Civil Engineers is a half-baked farce that may already have been commandeered by political forces whose primary interests, to put it mildly, lie far afield of full disclosure...."
"Since August 2005, when the National Institute
of Standards and Technology (NIST) published
its report on the 9/11 collapse of New York’s
World Trade Center Towers, the International
Code Council (ICC) and others have been
struggling to develop provisions based on
NIST’s recommendations. In support of this
effort, ICC members formed the Terror-
Resistant Buildings Committee (TRB) to
develop specific code change proposals and
submit them for adoption into the International
Building Code (IBC). In 2006, TRB prepared a
series of proposals for inclusion in the 2007
supplement to the 2006 IBC.
The National Council of Structural Engineers
Associations (NCSEA) formed an ad-hoc joint
industry committee to review these proposals.
In addition to structural engineers representing
NCSEA, this committee includes representatives
of ASCE/SEI, AIA, ACI, AISC, PCA,
PCI, SJI, TMS and other industry associations.
This committee found that the proposals
developed by TRB were vague, unenforceable,
created undue liability on the part of design
professionals and did little to address the
disasters that occurred on 9/11. The ad hoc
committee was successful in convincing ICC to
reject these proposals at the September 2006
code hearings, However, the proponent of these
proposals has resubmitted them for
consideration at the final hearings, to be held in May 2007 in Rochester, NY.
While it is unlikely the specific proposals
proposed by TRB will be adopted, IT IS CLEAR THERE IS A POLITICAL WILL on the part of ICC to adopt some changes so that ICC can say it
has improved the building code in light of the
9/11 disasters.
Although most members of the ad hoc
committee believe that major changes to the
building code requirements are not warranted by
the events of 9/11, committee members are
resolved to the inevitability of some change being introduced to the code, based on political rather than technical reasons. The committee hopes that the proposals it is developing will minimize the impact on design professionals and building construction costs, satisfy the ICC that it has taken appropriate action, and provide some improved integrity in building construction."
In Bailey's Crossroads, VA, a large apartment complex called Skyline Plaza was under construction. Workers were busy pouring concrete on an apartment building in the complex and at 2:30pm on March 2, 1973, a large progressive collapse occurred in the center of the building, collapsing each floor from the top down. The root cause of the problem is said to be due to the premature removal of forms and shoring for slabs in the vicinity and specific columns on the 23rd floor. Four key concrete columns along with the concrete slab did not reach their desired strength and failed, causing the floor above to collapse onto the floor below, bringing a large center portion of the structure to the ground.
originally posted by: Iwinder
a reply to: Answer
He's a firefighter, not a structural engineer. I'm sure he's great at putting out fires Ho but nobody knows what actually happened inside the towers where the planes impacted.w much of the internal structure was destroyed? How much was damaged and weakened by fire? Was there enough undamaged structure to bear the weight of the upper floors? All the "experts" I've seen referenced by the 9/11 conspiracy nuts are stating an opinion based on very little evidence.
And the Harley guy's qualifications were just what?
They must have been Harvard because he was featured on every News Channel within half an hour of the towers coming down and it was then as it is now " Gospel"
but nobody knows what actually happened inside the towers where the planes impacted.w much of the internal structure was destroyed? How much was damaged and weakened by fire? Was there enough undamaged structure to bear the weight of the upper floors?
Thats very astute to observe the above fact, so nobody knows what actually happened inside the tower but yet here you are posting your wisdom and knocking a life time firefighter's personal testimony.
Let me tell you one thing, I have never disclosed this in a thread but I will now.
My father In law (long gone now) was a Deputy fire chief upon retiring and I will tell you this straight up, Fireman do not lie, they do not fabricate stories, they know what they see and the best part is their job is to save our asses.
Regards, Iwinder
originally posted by: Answer
originally posted by: Iwinder
a reply to: Answer
He's a firefighter, not a structural engineer. I'm sure he's great at putting out fires Ho but nobody knows what actually happened inside the towers where the planes impacted.w much of the internal structure was destroyed? How much was damaged and weakened by fire? Was there enough undamaged structure to bear the weight of the upper floors? All the "experts" I've seen referenced by the 9/11 conspiracy nuts are stating an opinion based on very little evidence.
And the Harley guy's qualifications were just what?
They must have been Harvard because he was featured on every News Channel within half an hour of the towers coming down and it was then as it is now " Gospel"
but nobody knows what actually happened inside the towers where the planes impacted.w much of the internal structure was destroyed? How much was damaged and weakened by fire? Was there enough undamaged structure to bear the weight of the upper floors?
Thats very astute to observe the above fact, so nobody knows what actually happened inside the tower but yet here you are posting your wisdom and knocking a life time firefighter's personal testimony.
Let me tell you one thing, I have never disclosed this in a thread but I will now.
My father In law (long gone now) was a Deputy fire chief upon retiring and I will tell you this straight up, Fireman do not lie, they do not fabricate stories, they know what they see and the best part is their job is to save our asses.
Regards, Iwinder
I'm not saying the firefighter is lying. I'm saying he doesn't know. Just like you don't know and I don't know and all the 9/11 truthers don't know.
I'd like to see which part of my post was me "posting my wisdom." I said nobody knows. This argument is just as stupid as the "moon-landing was a hoax" argument and the Kennedy assassination argument. It's a bunch of people yelling at each other about conjecture and theory with no actual evidence or facts.
I'm not saying the firefighter is lying. I'm saying he doesn't know. Just like you don't know and I don't know and all the 9/11 truthers don't know.
Watch the video tell EVERYONE now the fires had stopped