| 摘要 |
A multistory emergency stairwell structure for escape and rescue in different emergency situations adapted for building proximate to a pre-existing multistory building, and being built as a separate construction from the pre-existing building for facilitating passage of occupants between the pre-existing building and the stairwell structure by means of a passageway that is attached at one end only to either the pre-existing building or to the stairwell structure and is free to move at its opposite end. |
