How far apart should fire alarms be?
In compliance with the National Fire Protection Association (NFPA), smoke alarms will cover a radius of 21 feet, and an area of coverage of 1,385 square feet. The maximum distance between two smoke alarms should be 30 feet. If a hallway is greater than 30 feet, a smoke alarm must be installed at each end.
Where do you put beam detectors?
The beam detector can be mounted with the transmitter/receiver on one wall and the reflector on the opposite wall, or both suspended from the ceiling, or any wall/ceiling combination. In the case of the ceiling mount, the distance from the end walls should not exceed one-quarter of the selected spacing (7.5 ft.
How do you measure smoke detector spacing?
We know that smoke detector spacing is determined by the manufacturer’s recommendations which is typically around 30′. If we take 30′ and multiply it by 0.7 we arrive at a new spacing for smoke detectors of 21′.
What is the function of beam detector?
An optical beam smoke detector is a device that uses a projected beam of light to detect smoke across large areas, typically as an indicator of fire. They are used to detect fires in buildings where standard point smoke detectors would either be uneconomical or restricted for use by the height of the building.
How do you test a fire alarm with a beam detector?
Hold the “No Alarm” test filter section over the receiver lens. The alarm should not sound after 15 seconds and the green LED should continue pulsing. Test filters verify the sensitivity setting of beam smoke detectors.
How should smoke alarms be installed and maintained?
Recommended placement of smoke alarms
- Place it as close as possible to the centre of the ceiling as possible, or no closer than 300mm to any wall or corner, and no closer than 900m from the apex (tip) of a pointed ceiling.
- Install a smoke alarm in each room that is divided by a partial wall.
What is the minimum distance from the sidewall for a ceiling mount smoke detector?
Ceiling-mounted units also must be placed no closer than 4 inches from a side wall. Spacing between smoke detectors is likewise important. On a smooth ceiling, the common distance between each smoke detector is 30 feet.
What is code for fire alarms?
NFPA 72
For many years NFPA 72, National Fire Alarm and Signaling Code, has required as a minimum that smoke alarms be installed inside every sleep room (even for existing homes) in addition to requiring them outside each sleeping area and on every level of the home. (Additional smoke alarms are required for larger homes.)