9
USEFUL TIPS
•
In hallways or corridors exceeding 7.5m in length, no point within the hallway or corridor
should exceed 7.5m from the nearest detector.
•
Install a first-floor smoke detector at the top of the ground-to-first floor stairwell. Be sure
that no door or other obstruction blocks the path of smoke to the alarm.
CEILING, WALL AND PITCHED ROOF INSTALLATION
IV
NOT TO SCALE
300mm
300mm
V
NOT TO SCALE
150mm
300mm
300mm
600mm
150mm
VI
NOT TO SCALE
Ideally, the detector should be
located as central as possible.
The detector must be installed
at least 300mm from walls
or any light fittings as shown
in fig IV.
If ceiling mounting is not
possible, when wall mounting
the top of the detector should
be 150 - 300mm from the
ceiling and at least 300mm
from any walls or objects as
shown in fig V.
When siting a
smoke detector
on a pitched ceiling, the centre
must be no more than 600mm
and a
heat detector
no more
than 150mm vertically below
the apex as shown in fig VI.
Please note: If it is not possible to locate the smoke or heat detector at the required distance from
the apex on a pitched ceiling, it is considered a flat ceiling and should be installed as fig IV.
