A Mechanical Engineer has this to say about WTC
"R" value is the resistance to the transfer of heat, certainly. But it's effectiveness is a factor of the temperature difference across the insulating material's surfaces. An R-value of 3 is almost useless anywhere. The typical new construction home has attic insulation equivalent to between R-18 and R-40. And that's just to help keep heating and cooling costs down. The foam fire-retardant that is sprayed onto steel beams in construction is there to protect the beam from prolonged exposure to high temps, but it usually has an R-value of at least 10-15. And even THAT will not protect against 2000 degree flames from jet fuel. Which, by the way, was not present. No residual trace of J-1 was found in any of the independent tests. The buildings were brought down by squibs placed on the girders weeks in advance by operatives of the CIA. Fact. Not guesswork. Fact known and shown to me by insiders with access...high level above top secret
911,
Steel,
WTC,
falseflag,
