Manual pull station/manual call points – Devices to allow people to manually activate the fire alarm. Usually located near exits. Also called “manual pull boxes”. Other countries have different devices as standard, for example the Uk uses ‘break – glasses’, when people break a small pane of glass to activate the alarm
- Notification appliances may employ audible, visible, tactile, textual or even olfactory stimuli to alert the occupants os a fire or other emergency.
- Audible or visible signals are the most common and may utilize speakers to deliver live or pre-recorded instructions to the occupants.
- In the united States fire alarms evacuation signals are required to use a standardized interrupted four count temporal pattern to avoid confusion with other signals using similar sounding appliances.
Magnetic door holders – wall of floor mounted electromagnets controlled by a fire alarm system or directly connected smoke detectors that hold open spring- loaded self-closing smoke tight doors by magnetic attraction to a door mounted iron armature.