DW1500110 Rev.K1
Sep 18 2015
9
6.2.7
Sloping ceiling (peaked and shed)
In the rooms with peaked ceilings, the first row of detectors must be located within 1 m (3 ft.)(measured horizontally) of
the ceiling peak, but not closer than 10 cm (4 in.) vertically to the peak. Additional detectors, if required, must be
located based on the horizontal projection of the ceiling and the type of ceiling construction. In the rooms with shed
ceilings having a slope greater than 1 m in 8 m (1 ft. in 8 ft.), the first row of detectors must be located within 1 m (3 ft.)
of the high end of the ceiling. Additional detectors, if required, must be located based on the horizontal projection of the
ceiling and the type of ceiling construction. For a ceiling slope of less than 30 degrees, all detectors must be spaced
using the height at the peak. For a ceiling slope of 30 degrees or greater, all detectors must be spaced using the
average slope height or the height of the peak.
Figure 7: Smoke detector spacing
—
Sloped ceiling (peaked type)
Figure 8: Smoke detector spacing
—
Sloped ceiling (shed type)
910 mm
(36 in.)
910 mm
(36 in.)
100 mm
(4 in.)
Not in this area
Anywhere in
this area
S
S
S
1
2
S
1
2
Space between detectors
Smoke detector or Heat detector
1
2
S
1
2
S
S
S
S
S
S
910 mm (36 in.)
maximum
Space between detectors
Smoke detector or Heat detector
