GLT-299-7-2(3) Rev.0
Mar 23, 2018
12
8.2.5
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.
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
Figure 11: Heat detector spacing
— Sloped ceiling (peaked type)
1
2
S
1
2
S
S
S
S
S
S
910 mm (36 in)
maximum
Space between detectors
Smoke detector or Heat detector
Figure 12: Heat detector spacing
— Sloped ceiling (shed type)
