Yes it does, a great amount of heat, and the thicker the steel the more heat you need. Especialy if it was steel meant to withstand fire. (which it was) 1600 degrees (The heat that jet fuel produces) isnt even as hot as the temps they used to test that steel. That steel didnt melt or weaken in almost 400 degree's hotter than the conditions it saw on 9/11. On top of that, as we all clearly saw as the planes hit the buildings, alot of the fuel came out as a giant fire ball on impact on the other side, so the fire inside was also exagerated. They have a fire fighter on radio putting together a plan to put the fire out, as he saw it. That wouldnt not have been possible if it were burning as intense as was told.