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An escape chute is a special kind of emergency exit, used where conventional fire escape stairways are impractical. The chute is a fabric (or occasionally metal) tube installed near a special exit on an upper floor or roof of a building, or a tall structure. During use, the chute is deployed, and may be secured at the bottom by a fire fighting crew some distance out from the building. Once the tube is ready, escapees enter the tube and slide down to a lower level or the ground level. ==Description== Although some early escape tubes were made entirely of metal, most current designs are made of high-strength fabrics, such as Kevlar. Their flexibility allows for compact storage, rapid deployment, and a gentler braking and controlled descent of users, as compared to traditional metal designs. Fabric tubes may also incorporate inflatable elements to lend some degree of structural rigidity and stability to the escape chute. The fabrics chosen must have fire retardant properties as well. In addition to fixed escape chutes permanently installed onto buildings, mobile escape systems are produced which can be mounted on the basket of a movable fire truck ladder, or temporarily installed to a building in an emergency. In response to images of trapped office workers in the September 11 World Trade Center disasters, personal escape devices for emergency use have been proposed, but only rope-based systems appear to be on the market for personal use. Escape chutes are also installed in air traffic control towers where space for redundant stairwells is limited. Escape chutes were tested at the control tower at Kadena Air Base. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Escape chute」の詳細全文を読む スポンサード リンク
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