Kidde Fire Systems DS Series, Application Manual

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K-76-1000 -14- July 2016
Sloping Shed-Typed Ceilings
In rooms with sloped ceilings having a slope greater than 1 ft. in 8 ft. (1 m in 8 m), place the first row of
detectors within 36 in. (910 mm) of the high end of the ceiling, but not closer than 4 in. (100 mm) from the
adjoining wall or ceiling. (Refer to Figure 6 below.) Space additional detectors, if required, based upon the
horizontal projection of the ceiling and ceiling construction.
If the slope is:
•
Less than 7.2° (1 in 8), treat the ceiling as a level ceiling
• Less than 30°, adjust the horizontal spacing according to the height of the peak
Greater than 30°, adjust the horizontal spacing according to the average sloped ceiling height or to the
height of the peak. This spacing modification for sloped shed-typed ceilings is identical for spot-type heat
detectors and smoke detectors.
Figure 6. Heat or Smoke Detector Spacing for Sloping Shed-Typed Ceilings
1. Heat or smoke detector
2. Do not mount detector in this area
3. Mount detector anywhere in this area S = Listed spacing between DS-HFS detectors
= 50 ft. (15.2 m)