DW1500110 Rev.K1
Sep 18 2015
6
6.2.3 Stratification
Stratification of air in a room can hinder smoke from reaching ceiling-mounted smoke detectors. In order to improve
detection response in situations where stratification exists, it might be necessary to install additional smoke detectors
on sidewalls or at locations below the ceiling, as shown in Figure 2.
Figure 2: Smoke detector layout accounting for stratification
6.2.4 Partitions
It is recommended that the distance between smoke detectors should not exceed a nominal spacing of 9.1 m (30 ft.)
and there should be detectors within a distance of one-half the nominal spacing, measured at right angles from all
walls or partitions extending upward to within the top 15 percent of the ceiling height.
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