240
The Fire Section: Fire Section Characteristics
The planning constraint is rather one of a need to conform to preset wall
configurations. This may require a minor increase in the size of a room or
a department. It also requires coordination between fire separation walls
and large open areas such as a therapy pool, an auditorium, kitchen-
dining area, etc. or open departments such as medical records or certain
types of laboratories. These constraints to planning are to a large extent
predictable and can be accommodated. As such, they are judged less
critical when compared to the alternatives of irregular service zones or
relocation of slab to slab fire separations in subsequent alterations.
242.3.3
As stated previously, unlike two-hour fire partitions, smoke stop partitions
and corridor partitions span from the structural slab to the one-hour fire-
resistive ceiling-platform. They are considered adaptable components
and can be located along the boundaries of individual rooms. (See Figure
240-3.) There is one exception. If cost and engineering analysis indicated
definite advantages, the service zone could be used as a return air
plenum. In such a case, all smoke stop partitions would have to span
from structural slab to structural slab with appropriate protection to all
penetrations. Consequently, the location of these partitions could become
critical in terms of maintaining the continuity of the service zone. Where
possible, they should be located at the boundary between service
modules.
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