7
3. Recommended Locations
• When mounting the alarm on a sloping ceiling, it should not exceed
1500mm away from the apex. The spacing of additional alarms, if
any, should be based on a horizontal distance measurement, not
a measurement along the slope of the ceiling (see
FIGURE 2B
)
FIGURE 2A
CEILING
PEAK CEILING
300mm
MINIMUM
600mm
MINIMUM
MAXIMUM
SIDE WALL
BEST
PLACEMENT
DO NOT INSTALL
DO NOT INSTALL
DEAD AIR
NOT IN THIS AREA
ANYWHERE IN THIS AREA
500mm
1000mm
DEAD AIR
ACCEPTABLE
PLACEMENT
100mm
FIGURE 2B
DEAD AIR
DO NOT INSTALL
SLOPED CEILING
NOT IN THIS AREA
500mm
ANYWHERE IN THIS AREA
1000mm
• In rooms with open joists or beams,all ceiling mounted alarms shall
be located on the bottom of such beams. (See
FIGURE 2C
)
• Alarms installed on an open-joist ceiling shall have the smooth
ceiling spacing reduced to no more than half of the listed spacing
when measured at right angles to the solid joist. (See
FIGURE 2C
)
FIGURE 2C