But they were not. Claims have been made, as we have seen, about the jet fuel. But much of it burned up very quickly in the enormous fireballs produced when the planes hit the buildings, and rest was gone within 10 minutes,
[12] after which the flames died down. Photographs of the towers 15 minutes after they were struck show few flames and lots of black smoke, a sign that the fires were oxygen-starved. Thomas Eagar, recognizing this fact, says that the fires were “probably only about 1,200 or 1,300˚F” (Eagar, 2002).
There are reasons to believe, moreover, that the fires were not even that hot. As photographs show, the fires did not break windows or even spread much beyond their points of origin (Hufschmid, 2002, p. 40). This photographic evidence is supported by scientific studies carried out by NIST, which found that of the 16 perimeter columns examined, “only three columns had evidence that the steel reached temperatures above 250˚C [482˚F],” and no evidence that any of the core columns had reached even those temperatures (2005, p. 88).
NIST (2005) says that it “did not generalize these results, since the examined columns represented only 3 percent of the perimeter columns and 1 percent of the core columns from the fire floors”. That only such a tiny percent of the columns was available was due, of course, to the fact that government officials had most of the steel immediately sold and shipped off. In any case, NIST’s findings on the basis of this tiny percent of the columns are not irrelevant: They mean that any speculations that some of the core columns reached much higher temperatures would be just that---pure speculation not backed up by any empirical evidence.
Moreover, even if the fire had reached 1,300˚F, as Eagar supposes, that does not mean that any of the steel would have reached that temperature. Steel is an excellent conductor of heat. Put a fire to one part of a long bar of steel and the heat will quickly diffuse to the other parts and to any other pieces of steel to which that bar is connected.
[13]
For fires to have heated up some of the steel columns to anywhere close to their own temperature, they would have needed to be very big, relative to the size of the buildings and the amount of steel in them. The towers, of course, were huge and had an enormous amount of steel. A small, localized fire of 1,300˚F would never have heated any of the steel columns even close to that temperature, because the heat would have been quickly dispersed throughout the building.
Some defenders of the official story have claimed that the fires were indeed very big, turning the buildings into “towering infernos.” But all the evidence counts against this claim, especially with regard to the south tower, which collapsed first. This tower was struck between floors 78 and 84, so that region is where the fire would have been the biggest. And yet Brian Clark, a survivor, said that when he got down to the 80th floor: "You could see through the wall and the cracks and see flames . . . just licking up, not a roaring inferno, just quiet flames licking up and smoke sort of eking through the wall."
[14] Likewise, one of the fire chiefs who had reached the 78th floor found only “two isolated pockets of fire.”
[15]
The north tower, to be sure, did have fires that were big enough and hot enough to cause many people to jump to their deaths. But as anyone with a fireplace grate or a pot-belly stove knows, fire that will not harm steel or even iron will burn human flesh. Also in many cases it may have been more the smoke than the heat that led people to jump.
In any case, the fires, to weaken the steel columns, would have needed to be not only very big and very hot but also very long-lasting.
[16] The public was told that the towers had such fires, with CNN saying that “very intense” fires “burned for a long time.”
[17] But they did not. The north tower collapsed an hour and 42 minutes after it was struck; the south tower collapsed after only 56 minutes.
To see how ludicrous is the claim that the short-lived fires in the towers could have induced structural collapse, we can compare them with some other fires. In 1988, a fire in the First Interstate Bank Building in Los Angeles raged for 3.5 hours and gutted 5 of this building’s 62 floors, but there was no significant structural damage (FEMA, 1988). In 1991, a huge fire in Philadelphia’s One Meridian Plaza lasted for 18 hours and gutted 8 of the building’s 38 floors, but, said the FEMA report, although “
eams and girders sagged and twisted . . . under severe fire exposures. . . , the columns continued to support their loads without obvious damage” (FEMA, 1991). In Caracas in 2004, a fire in a 50-story building raged for 17 hours, completely gutting the building’s top 20 floors, and yet it did not collapse (Nieto, 2004). And yet we are supposed to believe that a 56-minute fire caused the south tower to collapse.
Unlike the fires in the towers, moreover, the fires in Los Angeles, Philadelphia, and Caracas were hot enough to break windows.
Another important comparison is afforded by a series of experiments run in Great Britain in the mid-1990s to see what kind of damage could be done to steel-frame buildings by subjecting them to extremely hot, all-consuming fires that lasted for many hours. FEMA, having reviewed those experiments, said: “Despite the temperature of the steel beams reaching 800-900°C (1,500-1,700°F) in three of the tests. . . , no collapse was observed in any of the six experiments” (1988, Appendix A).
These comparisons bring out the absurdity of NIST’s claim that the towers collapsed because the planes knocked the fireproofing off the steel columns. Fireproofing provides protection for only a few hours, so the steel in the buildings in Philadelphia and Caracas would have been directly exposed to raging fires for 14 or more hours, and yet this steel did not buckle. NIST claims, nevertheless, that the steel in the south tower buckled because it was directly exposed to flames for 56 minutes.[18]
