AST Digital Magazine July 2017 Digital-July | Page 18

Volume 14 July 2017 Edition The Guardian Escape System accomplishes this by using a combination of several simple, low- tech devices. They require no power, are inexpensive, have a long shelf-life and are easy to use. They have developed permanent and portable Escape Systems to attach to a structure. Each System incorporates a Controlled Descent Device, commonly referred to as a “CDD” which works like a pulley. Then the process repeats. Everyone gets out. Escape Harnesses are permanently attached at each end of the cable and full fire resistant Evac- uation Suits are available. Each CDD incorporates a poly-steel cable with a neoprene inner lining and braided polyester jacket to protect it against abrasion, moisture and heat. Cable lengths are currently available up to 1000 feet (305 meters) or about 100 floors. In operation, a user slides an Escape Harness over them, climbs over their balcony or out a win- dow and the CDD slowly lowers them automati- cally at the rate of 3 feet per second. Other options are available for locations exceed- ing these heights. (See in Action, courtesy of High Rise Escape Systems and YouTube) This speed can be compared to a slow elevator. As they descend, the opposite end of the cable automatically retracts and reloads the CDD for the next evacuee. High Rise Escape has also developed fire resis- tant Evacuation Suits for use with the CDD. 18