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384 pages, Paperback
First published January 4, 2005
[T]he 1968 code eliminated the need for reinforced staircases and vestibules. Not only the fire towers disappeared. So did half the staircases. The 1968 code reduced the number of stairways required for buildings the size of the towers from six to three. Moreover, those three would have less protection, as the new code lowered the minimum fire resistance for walls around the shafts from three hours to two, and permitted them to be built from much less sturdy material. All these changes offered significant financial opportunities…They would increase the space available for rent by getting rid of stairways and make the building lighter by lowering the fire resistance and eliminating the requirements for masonry.
Nearly all the 6,000 civilians below the impact zone had left the north tower by the time of its collapse, a fact hard to square with the notion that most of the approximately 200 firefighters who died in the north tower could not get out because they were busy helping civilians. In the oral histories collected by the Fire Department, numerous firefighters recalled that they were unaware of how serious the situation had become in those final minutes. This does not mean that the firefighters were not a welcome and uplifting presence…Yet…[that presence] does not explain why so many firefighters died in a building they could have escaped and where there was scarcely anyone left who could be helped. On the 19th floor of the north tower, scores of doomed firefighters were seen…taking a rest break in the final minutes, coats off, axes against the wall, soaked in sweat…