No one said that the iron cannot, or did not melt.
What I said, was that as you heat iron/steal from normal ambient temperatures through 1,671 F, on the way to the melting point (2,800 F), the crystalline configuration of iron changes. Iron/steel will undergo normal and expected expansion from room temperature and up, but when it crosses above 1671 F - it will SHRINK by half, as the atomic crystalline structure changes. No force on earth can stop it. It's done at the atomic level.
As you continue to heat the iron, beyond the face centered cubic phase (A4 point), eventually it will melt into a liquid. This is an area of metallurgy called Materials Science. Something most engineers learn.
Howd they convince those steel beams throughout the entire building to all shrink within the same 10 seconds? And thrice on one day and never before or again after ?
The change in crystalline structure doesn't require ALL of the steel beams to buckle at the same time. If you have a single 8 ft section of beam, that decides to become a 4 ft section of beam; it will pull the floor above it down. When you have an area about the size of a 747 all burning, you have sufficient heat to affect the central pillars. Then you start a pancake collapse.
The location of the impact, was designed for precisely this type of failure. Too high, and you don't have sufficient mass to create the pancake failures, too low and the impact will not begin the chain reaction.
Based on your 'pancake' theory I should be able to stand a school bus on end and drop a Volkswagen bug from say 10/20 feet above the front of the bus from the top end. What I should witness is the bug 'pancake' the bus all the way to the bottom end or ie, completely flattened the bus top to bottom. I sincerely hope you have nothing to do with civil engineering.
That explain the molten metal months after?
No one said that the iron cannot, or did not melt. What I said, was that as you heat iron/steal from normal ambient temperatures through 1,671 F, on the way to the melting point (2,800 F), the crystalline configuration of iron changes. Iron/steel will undergo normal and expected expansion from room temperature and up, but when it crosses above 1671 F - it will SHRINK by half, as the atomic crystalline structure changes. No force on earth can stop it. It's done at the atomic level.
As you continue to heat the iron, beyond the face centered cubic phase (A4 point), eventually it will melt into a liquid. This is an area of metallurgy called Materials Science. Something most engineers learn.
Howd they convince those steel beams throughout the entire building to all shrink within the same 10 seconds? And thrice on one day and never before or again after ?
The change in crystalline structure doesn't require ALL of the steel beams to buckle at the same time. If you have a single 8 ft section of beam, that decides to become a 4 ft section of beam; it will pull the floor above it down. When you have an area about the size of a 747 all burning, you have sufficient heat to affect the central pillars. Then you start a pancake collapse.
The location of the impact, was designed for precisely this type of failure. Too high, and you don't have sufficient mass to create the pancake failures, too low and the impact will not begin the chain reaction.
Based on your 'pancake' theory I should be able to stand a school bus on end and drop a Volkswagen bug from say 10/20 feet above the front of the bus from the top end. What I should witness is the bug 'pancake' the bus all the way to the bottom end or ie, completely flattened the bus top to bottom. I sincerely hope you have nothing to do with civil engineering.