9-11 Research: Tower Blueprints (external - login to view)
The detailed architectural drawings make clear what official reports have apparently attempted to hide: that the Twin Towers had massive core columns, and those columns ran most of the height of each Tower before transitioning to columns with smaller cross-sections.
Based on construction photographs exhibited in the Skyscraper Museum and illustrations from the Engineering News Record , 9-11 Research had established by mid-2005 that, low in the Towers, the sixteen core columns that bounded the long faces of the buildings' cores had dimensions of 54 by 22 inches. The detailed drawings show that these columns maintained these dimensions through about the 66th floor.
Both of the government-sponsored engineering studies of the Twin Towers' "collapses" -- FEMA's and NIST's -- are highly misleading about the core structures. Neither Report discloses dimensions for core columns -- dimensions that are clearly evident in the architectural drawings. Both Reports use a variety of techniques seemingly designed to minimize the strength of the cores or to conceal their structural role entirely. So effective was FEMA at concealing the nature of the cores that the 9/11 Commission Report , citing the FEMA Report, denied the very existence of the core columns.
Posted Mar 27, 2007 09:57 PM (external - login to view)
Category: 911 (external - login to view)
911research.wtc7.net/wtc/evid...lueprints.html (external - login to view)