Christopher A Brown thinks these plans are
fake.
I should point out that this person thinks the towers were built with C4 type explosives laid in place as the towers went up.
He claims that on each floor,before the concrete floor was poured into the pans,the regular workforce was escorted off the site by armed security guards,and a team of specialists came in to treat the bare metal with "flame retardants".He also claims that the core of the towers is being misrepresented to make them appear weaker than they actually were.
He is appealing to the public for copies of a 1990 documentary called
"The Engineering and Construction of the Twin Towers"
He thinks this documentary has been purged from the public eye, as it backs up his claims.