NO, I am saying they COULD have melted.

In fact it has been shown that the WEAKENING of the supports due to the LOWER than melting temperatures would have been sufficient to caust the collapse.

The MOLTEN steel that is remarked upon may have been from the initial destruction, OR the subsequent burning after the collapse- I do not know which is more likely. After the collapse,I suspect there were a lot of enclosed "spaces" that would have been insulated by enough debris to trap enough heat to melt steel.