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The paper substantiates the possibility of using the elevators as the main evacuation path from high-rise multi-storey buildings. The analysis of the reasons preventing effective evacuation of people from high-rise buildings is carried out. A tall multi-storey office building was modeled in the Pathfinder software package. Several scenarios of the human flow are presented, and the influence of time parameters (the beginning of evacuation and delay of signal delivery), the composition of the flow (different ratios of people of different mobility groups), and the level at which the evacuation of each group begins are reflected on the time of evacuation using elevators. The time of evacuation by a staircase is compared with the time of evacuation using elevators. It is shown that it is effective to use evacuation elevators in 60-storey buildings, but it is not rational to use them for a 20-storey building.

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The article discusses the possibility of using the elevators as the main evacuation path from high-rise buildings. It starts by analysis of the reasons, which make effective evacuation of people from high-rise buildings difficult. The high multi-storey office building was modelled in the Pathfinder software package. There are presented some scenarios of the human flow and their influence on time parameters (the evacuation start and signal delivery delay), on flow composition (ratio of people with different mobility) and base evacuation level of each group. The time of evacuation is compared on the staircase and using elevators. It is effective to use evacuation elevators in 60-storey buildings, but it is not rational to use them in 20-storey building.

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The article considers elevator application as an integral part of the main evacuation path from high-rise multi-storey buildings and structures. The evacuation ways are rather long in this building type. It makes the evacuation process difficult and dangerous, and sometimes physically impossible. The combined evacuation with using of vertical transport can solve this problem. The complex of buildings of various storeys (20, 30 ... 60) was modeled in the program complex Pathfinder. We determine and compare the values of the evacuation time for different health categories people during movement on stairs and with particular elevator use. The percentage of acceleration of evacuation is given. It is shown that evacuation along the staircase develops as a linear function. The necessary of the joint stair-lift evacuation method increases with the height of the building. We offer the human flow ratios for evacuating people in simulated buildings (20, 30 ... 60), which is made taking into account the various mobility categories.

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