okay fellow, Give me a credible reason and I will accept your claim about steel structures, for example one another building collapsed. Maybe your right I'm not an expert but without proof I can't accept it.
Himas numerously have denied that Iran fund it. Do you accept it? apparently ones denial is not enough.
I have heard numerous times many versions of your demand for logical arguments and that how you would concede. That has yet to happen. People like you are not interested in facts, logic, and finally the truth. You already made up your mind and this is nothing more than a pretense at portraying yourself as a 'logical' person. Nevertheless, for every one of you, there are hundreds more who are genuinely interested in a logical argument, particularly about this 'steel structures' subject, and so for their sakes, I will refute you, not that I expect you to change your mind.
Anyway...The argument generally goest: '...no modern steel structure had ever collapse due to fire prior to 9/11.'
The unspoken argument mean: No steel structure
CAN collapse due to fire.
The fallacy is obvious for many reasons, one being the exclusion of probability, meaning that not even an accidental damage to any supporting member, or members, from fire, of this steel structure can initiate a global failure. So if it is impossible for a steel structure to fail due to fire, it could only mean a physical assault on a supporting member, or members, of this steel structure, that could initiate a global failure. But...We had such a physical assault on multiple supporting members. You do believe that an airliner had a collision course with a tower and traveled deep into the tower, right?
Again...The unspoken argument goest: No steel structure
CAN collapse due to fire.
Really?
The loony conspiracy theories believers trotted out the Winsor Tower fire in Spain where that building did not collapse. But their deception was exposed in that the Windsor was of a hybrid construction...
Case Studies: Historical Fires: Windsor Tower Fire
Construction Type:
Reinforced concrete core with waffle slabs supported by internal RC columns and steel beams, with perimeter steel columns which were unprotected above the 17th Floor level at the time of the fire.
So we have steel columns above the 17th level. What happened to them?
It was believed that the multiple floor fire, along with the simultaneous buckling of the unprotected steel perimeter columns at several floors, triggered the collapse of the floor slabs above the 17th floor.
The steel members collapsed. So for a hybrid construction where concrete was the main material, of course the Windsor did not collapsed, but the steel members did failed. So for an all steel structure like the skeletons of the WTC towers, fire alone can indeed collapse such a structure given enough time and if the fire is not challenged, like how the fires of the Windsor and the WTC towers were not challenged.
Even concrete, which has superior fire resistant property, is not immuned from fire induced collapse...
Fire Protection Engineering Archives - Historical Survey of Multistory Building Collapses Due to Fire
A fire-initiated full collapse of a textile factory occurred in Alexandria, Egypt, on July 19, 2000. This 6-story building was built of reinforced concrete, and its fire started at about 9 a.m. in the storage room at the ground floor. Fire extinguishers were nonfunctional, and the fire spread quickly before the firefighters could arrive. An electrical short-circuit accelerated the fire spread. At about 6 p.m., nine hours after the start of the fire, when the blaze seemingly was under control and subsiding, the building suddenly collapsed, killing 27 people. Figure 3 shows a photograph of this collapse.
Here is how concrete is superior to steel in a fire...
The fire resistance of concrete | Concrete Construction | Find Articles at BNET
Concrete offers great fire resistance to structures. It is reasonably physically stable to about a thousand degrees Fahrenheit, and even above that temperature it usually does not fail dramatically. Concrete's thermal properties protect reinforcing steel and prestressing steel, and it does not fall off structural steel members like some fireproofing coatings do.
A steel structure, under stress like how a building would create that constant gravity load, would have buckled before its temperature reached 1000 F...
Fire resistance of steel framed buildings - Fire damage assessment of hot rolled structural steel
Strength loss for steel is generally accepted to begin at about 300ºC and increases rapidly after 400ºC, by 550ºC steel retains about 60% of its room temperature yield strength.
One thousand F equal to about 540 C. But here we have a 6-story tall
CONCRETE building failed due to fire and yet the WTC loony conspiracy theory believers are telling us that no steel structure
CAN collapse due to fire...!!!
I do not expect you to change your mind after the logical explanation presented above. I doubt that you have the technical education and intelligence to understand it.
About the video, explain me how the BBC reported the demolition of Salomon Brothers Building 20 minutes before it's actual happening?
If you provide me with reasonable answers for this questions and tones of other queries about 9/11 everyone will accept them.
That is a laugh. There are no shortage of sources that absolutely debunked those 'tones of other queries'. What you brought on is nothing new. What you did was simply took on one side that conformed to your preconceived notions and bring them on as if it is new and shocking. Not. You do not have the intellectual honesty, as in objectivity, to sit down and do an honest assessment of both sides.
Therefor your country shouldn't be afraid of an independent international investigation about 9/11 as Ahmadinejad demanded. If you consider U S's hands clear, why should you be worry? He never said which of the theories is true, he just asked for an investigation for finding the real responsible for incident.
Really? Has there been an international investigation on the death of Neda Agha-Soltan when Iran said a CIA agent shot her? What is Iran afraid of? But if you argue that her death was an internal affair, then why is the US obligated to Iran's or anyone's demand for an 'international' investigation? But...What is preventing Iran from reconstructing the event and present the technical findings to the world? Iran is filled with oil wealth, no?