You haven't answered a single one of my questions yet. Why is that?
Then explain how the sample FEMA tested was heated to 1800F, decreased in thickness and curled up around the edges.
office fires don't get that hot, not without help.
Q1)
explain how the sample FEMA tested was heated to 1800F
You don't seem to understand, it's not so much about the temperature, but it's about the resultant phenomenon. The FEMA paper itself provided several reasonable possibilities: "
It is possible that this a 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. A detailed study into the mechanisms of this phenomenon is needed to determine what risk, if any, is presented to existing steel structures exposed to severe and long-burning fires."
I'll offer another: The sample you keep pointing to was was from WTC7 (no similar observations were found in the other 2 buildings - which I think is very telling in-of-itself). We already know that WTC7 was a sulphur poisoned environment (from diesel fuel, gypsum, aluminum), as the building was collapsing and the heat and pressures spiked, the steel section in question was liquified and the sulfur reaction accelerated. I've already provided proof that oxidation and sulfidation can occur at temperatures well below the fire temperature of the buildings.
Q2)
decreased in thickness and curled up around the edges.
Again, the FEMA paper itself provided several reasonable possibilities: "
The unusual thinning of the member is most likely due to an attack of the steel containing copper (the tested sample was high-strength low-alloy (HSLA) steel containing copper and the copper made the steel more susceptible to the phenomenon)" and "1) The thinning of the steel occurred by high temperature corrosion due to a combination of oxidation and sulfidation. 2) The sulfidation attack of steel grain boundaries accelerated the corrosion and erosion of steel."
I already provided proof that oxidation and sulfidation would have i) occurred naturally over time, ii) can be accelerated at temperatures at less than 1/2 of fire temperature in the towers and 3) would have been accelerated by the temperatures and pressures during the collapse and in the rubble pile.
You paranoid conspiracy types see words like "sulfidation attack", "hot corrosion attack". "unusual thinning" and you immediately conjure images of "gov't operatives" wearing dark sunglasses planting bombs on the WTC's structure. You choose to ignore the much more reasonable explanations, because they don't feed your need for believing everyone is out to lie to you and/or kill you.
I think at this point your theory has been thoroughly debunked. Time to move on.