The High-Rise Building Multiple Entry Vertical Escape Technology 

1968 - 2001

History will shows that:
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ABC Picture

People that were trapped above the floor levels impacted  could have been evacuated by only one set of four or five units of ZEC-EM, remaining operative over 25, in few minutes.
The Zephinie   Escape Chute (ZEC) 
can operate over 100 floors.  
Can evacuate up 1000 persons per minute, including handicapped ,  injured persons with the same average escape speed.
Ignorance or bad will
can't invalidate demonstrable 

Fire code enclosed ZEC escape chute 
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ZEC Introduction
Design history
How could have?
Multiple Entry
Tall Building
Retrofitting the ZEC
Search this Site
Site contents
ZEC Introduction
Design history
How could have...
Multiple Entry ME
Tall Building

Retrofitting the ZEC
Single Entry SE
ZEC-SE Single Entry Vertical Escape Chute
ZEC Components
25 years Applications
Anti-Terrorism Escape Installation
fun  Fund Rising & Charity
High Risk Industry Applications

Mobil Rescue 1
Mobile Rescue 2
Monorail Evacuation
Rocket Launching
Historic Archive
Reference 1
Reference 2
Fire Rescue Credits 
Press Clips Archive
The most popular
French Invention
of the 70's

Los Angeles. CA
ARC Support

Popular Science  1977
ZEC's Licensees
United Technologies Corp.
UTC-Otis France

UTC-Otis Spain

Historic Archive
licensee:  pirates and  liar
Fallacious claims on the technology
ZEC's Korean
Historic Archive 01
Historic Archive 02
United Technologies's Otis France Subsidiary ZEC's Catalogue 
History of Escape chutes technologies
ZEC Franchise
About the
Freeware Selection


Thirty years of conformism to special interests has barred the potential of commercialization of the only high rise alternative mass evacuation technique in the USA.

Misunderstanding the design's particularity that makes the Zephinie 's multiple entry evacuation modules has an unlimited height mass evacuation technique lead to non-sense question and unfair judgments.
The Zephinie's Multiple Entry evacuation module IS NOT mechanically a single continuous evacuation system but a series of one floor modular escape devices.

So, eventually thinking that under Galileo and Newton's physic laws, it could occur some physical difference on the ZEC-ME evacuation parameters between three stories and sometimes an 120 stories installation should not be a serious idea for anyone having learned engineering or architecture science.

The included illustration will try to explain that a ZEC-ME module performances and limits are autonomous of any other interconnected ZEC-ME units. Such as could be self-reliant from a floor length hook ladder from another similar ladder (fig 3) or a stairway's floor unit (fig 4) the physical performances and limits of a ZEC-ME installation is only related to the characteristic of a single standard ZEC unit... No matter if we have three stories, or we have a 300 stories building.

Mechanically, a ZEC per floor unit will have to absorb/transforms the potential of energy of about a mass limited to 200 kg over a vertical height in average of 3.5 meters.
The potential energy transformation occurring in a ZEC-ME is about 1700 w/s. The two sleeves give an area of 110,000 cm2 for dissipating said 1700 w/s giving an energy load to dissipate of about 0,05 watt second or 180 Joule per cm2 of chute fabric. (Back in 1968 it was a matter of concern. Since over one millions ZEC evacuation experiences have confirmed that we know how to manage the problem. We have set proprietary evaluation methods of heat effects). Please see note #1.

So if three stories ZEC-I module installation works fine, a ten, thirty or hundreds stories installation will work the same way using a classic logical methodical extrapolation. However, another problem arises from presuming of any analytical competence, when bad faith is involved ... to judge a life-saving technology badly needed for years by the honest American having a not special interest in fire safety deals.
Ignorance that the system works, and how it does works, remain the privilege of the newspapers' favorite top American specialist in evacuation. .
So... it is ignored that 2/5 stories demo structure ZEC-ME have been 100, 000's times publicly tested oversea for decades. Stubborn ignorance will not erase facts known by millions of witness in Europe and other countries... ZEC-ME system allows an effortless, precise and complete control of motion.
No equation can explain human's feeling.
Some day thousands Americans will personally experience the ZEC mass evacuation technology. Some day it will be impossible to hide anymore to the American public opinion the special interest biased motivations having motivated key players of the NY safety regulation about forbidding innocent people evacuation.

After making the intellectual efforts for understanding that a 100 floor ZEC-ME installation is made by interconnecting 100 "mechanically" independents ZEC-ME units ... just working like every single steep of a stairway.
A stairway steep will carry always the equivalent limited number of persons... no matter the height of the building, the mechanical parameters of step are equivalent.

High speed motion and eventual dissipation of potential energy conversion are obviously related with an erroneous idea of how eventually works the ZEC-ME.
The following intellectual effort to adjust with reality, is to try understanding that a ZEC-ME in an emergency evacuation situation is saturated ( like a stairway) by the disproportion of the number of entry versus the single exit capacity of the ZEC sleeve. No matter either if the extreme limit can reach 3600 people/hour for a 65cm diameter system (2ft). As soon as the ZECZEC- sleeves are saturated it results from a slow motion the ZEC-ME installation.


The vertical speed ranges in the .3<1m/s (1/3ft/s)
no much different that stairway descends speed but resulting three times faster because we use a vertical path and stairway a helicoid' path.
Of that results that thermal dissipation is a far less matter of concern than the tensile efforts transferred the sleeve and inertial overload.
So the breaking load of 14 tons for the support sleeve's payload of about 200kg. ( margins exceeding elevator industry safety standards)

Training for using ZEC-ME: the low-speed motion in case of mass evacuation makes absurd about the objection that public will not know to use the ZEC in case of severe emergency.
En masse evacuation occurrence a complete ignorance of how the system works is not a problem. However, it is a problem in case of using the ZEC-ME when the installation is empty.



Note # 1.
Thermal dissipation:
We have three different specific heat material and constant micro motion in the textile components. Strong electrostatic effects and pressure differential effects produced body motion in the ZEC sleeves.

The two "independent" sleeve's system presents still unequaled design advantage over any other vertical evacuation devices for smoothly transferring the breaking effect between the body in translation to the sleeve support due to a singular "form effect" resulting of the particularity of the low module elastomer used during the design.
A mathematical model remains extremely complex to work out:
The ZEC "form" effect would require extremely complex's tribological analytic works to be evaluated compared with straight surface friction effect.

The particular "form" effect also complicates mathematical interpretation considering the low's module synthetic elastic material reaction that produces the friction effect. The material presents complex electro-molecular potential energy storage, including time "hysteresis" phenomena and temperature effects.
Zephinie invented a precise testing device in 1976 to better evaluate the safety margins considering specific phenomena occurring in cloth material.
Most of the complex physical phenomena were considered in the thousands of tests of the different ZEC evacuation models (1973-1976).
Including strong UHF field to the ZEC storage were considered.
We have proprietary methods to monitor the ZEC sleeve's physical parameters.
Our 36 years experience to represent the original source of competences in the matter of modern vertical mass evacuation.



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ę  Copyright 1973, 2005 and following by Gerard J. Zephinie . 






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