Peaked Ceilings
Peaked structures follow the same guidelines as sloped ceilings with one exception. When
calculating the location of the detectors, the first detector is within 3 ft (1 m) of the peak
(measured horizontally). Space additional detectors down from the detector nearest the peak.
See the following figure:
Figure 3.8: Peaked Ceilings
1 3 ft (1 m) maximum S Selected detector spacing
Long Ceilings
Long ceilings over 350 ft (107 m) require more than one set of detectors to cover the entire
length. Determine the number of detector sets by:
– Dividing the ceiling length by 350 ft (107 m) and rounding up to the nearest number.
– Placing the detector sets to cover an equal amount of area.
– Setting the transmitters and receivers to the right and below to avoid possible cross talk.
– Setting the minimum spacing between adjacent detectors to L/10 the distance between
the transmitter and the receiver . For example, the minimum spacing for a beam length of
300 ft (91.5 m) is 30 ft (9 m).
See the following figure:
3.5.3
3.5.4
Projected-beam Smoke Detectors Document Introduction | en 11
Bosch Security System, Inc. Application Guide 2013.02 | 02 | F.01U.500.951
To Next Page
Loading...
