The base of the buliding appears to give way, that is the only means by which a perfectly symmetrical collapse can take place. False, symmetrical collapse CAN occur when failure occurs anywhere throughout a structure.
Even if there was damage to the south side, any collapse would have been lopsided as opposed to perfectly uniform. False. Symmetrical collapse CAN occur with failure of one side, element or part of a structure.
The other point is that the heat of burning furniture is insufficient to melt steel. False, offices fixtures and fittings can cause fires that can melt steel or cause steel to fail structurally. In Australia, steel needs to be coated or sealed off with fire resistant material (i don't know what American codes require). This does not prevent ultimate failure of the steel, but allows enough time for any building on fire to be evacuated. Ie, fire protection is there to protect people, not the structure or building itself. Offices are deemed to be high risk in relation to burning and fire damage due to the material of construction of the fixtures and fitting plus the high volme of paper that exist in offices. In Australia, office buildings are subject to greater fire control measurs than say an apartment building.
, not to mention that the fire occurred on the upper levels of the building. It just doesn't add up and NIST have provided a pretty lame excuse for what transpired. This is opinion so cannot respond categorically but one I obviously don’t agree with.