Wake up sometime.
"Does jet fuel melt steel" is a question of chemistry.
Next?
I don't really know of anyone who says that jet fuel melts steel. Perhaps some of the 9/11 conspiracy theorists in this forum have said it. I simply don't remember, and I am not going to go looking for them, and I don't even care.
The fact is, jet fuel of the past was similar to kerosene. I don't know what JF is made up of today. But if you put some kerosene in a steel can, it doesn't melt the steel can... at least not in quantities that are noticeable.
So, why do you even ask that? And your "Next" means what? Next question? You are asking the questions. Go ahead, ask another. I'll help. Is the sky blue? Or does it only look that way?
Here's ONE OF MANY TIMES you discuss jet fuel. Your concern. Not mine. And it's chemistry.
https://bitcointalk.org/index.php?topic=1025761.160;imode
There is lots of fuel in a plane of that size. But there is, also lots of building concrete and metal to be heated up with that fuel. In addition, there is convection time (the time it takes heat to penetrate steel and concrete from the outside). In addition, one need consider the air passages to the fuel. The fuel can't burn without air.
When you look at the pictures of the people standing around the crash openings in the buildings (Twin Towers before they came down), it is highly unlikely that that there was enough heat to melt anything - that most of the fuel burned off inefficiently in the air - because the people would not have been able to stand around in the 2,000+ degrees F that it would take to crumble concrete and melt steel, especially when there isn't near enough time for convection to have occurred without roasting the people as well.