Planning
Width of monitoring area
4
43
Building Technologies
007016_i_en_--
Fire Safety
2012-09-07
4.7
Width of monitoring area
The higher the room, the greater the width of the monitoring area. To cover
heightened risks, you can also select a smaller width of monitoring area.
The figure below shows the maximum widths of monitoring area depending on the
room height. If the infrared ray is positioned at a lower level to detect smoldering
fires, the distance from the floor to the detector applies instead of the room height.
Maximum widths of monitoring area depending on the room height
4.8
Distance between detector and ceiling
In order that the detector can detect smoke, the infrared ray must be positioned
immediately below the heat accumulation. Detectors and reflectors must therefore
be positioned at an ever-greater distance from the ceiling as the room height
increases. The steeper the angle of a gable roof, the greater the distance must be
between gable and infrared ray positioned in gable.
The figures below show the distance between the infrared ray and the ceiling
depending on the room height.
Flat ceilings
Flat ceilings: Distance between infrared ray and ceiling
