The Fundementals of Smoke Control
1-22 Infinity Smoke Control Guide
TOC
Another primary problem with letting elevators run during a smoke
emergency is the localized pressure differences that the cars create as
they travel up and down the shafts. For example, a car moving down
from the top of the shaft may create a small low air pressure zone near
the shaft’s top, which can pull smoke from the fire zone into the shaft.
At the present time, these issues have not been resolved. Pressurizing the
elevator shafts so that the elevators can operate during a smoke
emergency is still being studied. In general, elevators should not be used
as an escape route during an evacuation.
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