Comment: I made the distinction to

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I made the distinction to

I made the distinction to point out that building 7 fires would be burning at around the same temperature as buildings 1 & 2.

The fires of building 7 wouldn't have been burning even close to the jet fuel fires of towers 1 or 2; so your point is false. A fire fuelled with jet fuel, carpet, and office supplies will burn hotter than a fire fuelled with only office supplies.

How long was 7 on fire?

I stated that building 7 burned for about 7 or 8 hours; however, for Building 7 to have collapsed due to a fire being fuelled with only office supplies and office furniture it would have needed to burn at least one day(24 hours), though, in reality it would probably need longer if it would even be able to bring the building down.

At what temperature does steel lose 50% of its strength?

between 1800 and 2000 degrees.

At what temperature does it start to deform?

At around 2400 degrees.

Why were the steel columns fireproofed by the designers if there is nothing to fear from a fire?

Due to the fact that planes did fly into the Empire State Building, all Skyscrapers were forced to make preparation for Being hit by planes which also included the fires derived from the jet fuel. Also, they took precautions, due to the fact that in a skyscraper if something goes wrong, then the people on the upper levels will have to traverse down the building using only the steps. So using fire retardant material on the steal infrastructure was a precaution -to possibly give the occupants time to get down the steps.

At what temperature does carpet, and paper burn at?