| 摘要 |
The method of providing for escape from a building, that includes providing a safety door extending between a passage in the building, and the building exterior, the door extending upwardly from a location proximate the passage floor, supporting the door to open outwardly away from the passage, thereby opening the passage to the building exterior; and providing descent equipment including a cable or cables, for support by the door, and to move outwardly with the door so as to become located above the void below the opened door at the building exterior, whereby a person in the passage may access the descent equipment to be controllably lowered downwardly into the void at the building exterior while supported by the door.
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