explain how people could be rescued from above the floors with the
blazing fire at the World Trade Center Towers?
Brief answer to the question :
The ZEC- ME was
designed as a tall building antiterrorist evacuation back in
1975-75. For such reason the ZEC installation in the WTC
should have be done under the rule of dispersion and number of units
proportional to multiple parameter equation including chance of
neutralization of stairways in the range of 25< 50%, chance of
neutralization of the ZEC-ME up to 75%.
You are not
talking of a post event thesis, but on particular studies established
decade’s ego having been object of a non public divulge agreement with
the French Government in Dec.1975.
minimum, 20 ZEC-ME unit SHOULD have been installed in four sets of 5 units
in the extremes opposed corner of the WCT’s towers. (30 units
considering the large occupancy variation due visitors should have been
considered. Space occupied by 30 ZEC-ME unit on range in a
30<35m2 of business space occupation)
If the attack had occurred during pick hour occupancy the catastrophe’s
balance would have been worse.
The ZEC-ME units
are as minimum NFPA standard protected 2 hour fire resistant exits
including air pressurization, emergency lighting.
That means that ZEC installation are build to work with over 800
centigrade external temperature as any protected stairways.
Extra option of superior protection than NFPA standards was available,
because attack response to toxic aggression was included in the ZEC-ME
installation’s design includes sophisticated communication systems.
evacuation potential of the ZEC-ME obliged to rethink the problem of
ground zero evacuation and pre-programmed emergency response to help the
emergency evacuation command center to manage in real time with 20 or 30
disseminated exit routes in addition of the building stairways in a tall
building like the WTC. Partial destruction of the ZEC-ME installation was
a key aspect of the complex operational prevision.
evacuation method was designed to solve the well know proplem of tall
buildings particular evacuation impossibility in case of
abnormal-extraordinary emergency. Terrorist attack was and remains the
Terrorist attack will aims building collapsing.
So, as theory
studies and fact situation shows on published images of the disaster the
two set of 5 ZEC-ME in the opposed side of the impacted unit
would have been had remained available. With a capacity of
Even if all the
glasses of the building floor would have been blown out ( that is not the
case) the ZEC-ME installation minimum expected, would have probably
resisted, having a protection a far superior structural resistance than
ZEC-ME installation studies are designed and analytically reviewed on the
principle that the worse than expected has a non null chance. Only one of
the 10 ZEC-ME would have allowed 3000<4000 peoples in an hour to escape
from martyrdom from the trapped floor. It is easy to make a computer
simulation to shows how the ZEC would have done the job.
units below the attacked floor would have anyways remained fully
operational with a capacity of 40,000< 80,000 evacuation per hour as an
extra to the available stairway.
said are strictly demonstrable scientific facts.