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2. Door closer - Wikipedia

   en.wikipedia.org/wiki/Door_closer

   A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems. [2]

3. Fire alarm system - Wikipedia

   en.wikipedia.org/wiki/Fire_alarm_system

   A fire alarm control panel Fire alarm speaker and pull station. Fire alarm systems are composed of several distinct parts: Fire alarm control panel (FACP), or fire alarm control unit (FACU): This component, the hub of the system, monitors inputs and system integrity, controls outputs, and transmits information.

4. Electromagnetic door holder - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_door_holder

   If a fire alarm control panel, burglar alarm control panel, or similar emergency system is triggered, it will cut electrical power to the electromagnetic door holders under its control. The door holders release, allowing the doors to close automatically using door closers .

5. NFPA 72 - Wikipedia

   en.wikipedia.org/wiki/NFPA_72

   The NFPA 72 "covers the application, installation, location, performance, inspection, testing, and maintenance of fire alarm systems, supervising station alarm systems, public emergency alarm reporting systems, fire warning equipment and emergency communications systems (ECS), and their components."

6. Standards for Alarm Systems, Installation, and Monitoring

   en.wikipedia.org/wiki/Standards_for_Alarm...

   Activation of the alarm by intrusion or disturbance results in a signal being transmitted to a constantly-staffed police department [14] and the sounding device being activated until it is manually deactivated, power is exhausted, or an automatic timer shuts it off.

7. Fire door - Wikipedia

   en.wikipedia.org/wiki/Fire_door

   The intumescent and smoke-seal bounding of fire doors should be routinely checked, as should the action of the door closer and latch. Some fire doors are held open by an electromagnet, which is typically wired to a fire alarm system. If the power fails or the fire alarm is activated, the coil is de-energized, and the door closes.

8. Colorado star Travis Hunter 'for sure' heading to NFL in 2025

   www.aol.com/sports/colorado-star-travis-hunter...

   Colorado star Travis Hunter is heading to the NFL in 2025. The defensive back and wide receiver put the obvious on the record in a news conference with reporters on Thursday and said that the 2024 ...

9. BS 5839 Part 1 - Wikipedia

   en.wikipedia.org/wiki/BS_5839_Part_1

   BS 5839 Part 1 Fire detection and fire alarm systems for buildings – Part 1: Code of practice for design, installation, commissioning and maintenance of systems in non-domestic premises [1] is a standard published by the British Standards Institution.