Asked by Andy Blackwell in Uncategorized
What are magnetic release fire doors?
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Asked in Fire and Smoke Alarms
Do fire doors in hotels close when a wall alarm is broken?
There are many different kinds of fire doors and not all of them are tied to the alarm system. Some fire doors will only close when there is enough heat to sever a fusible link. However, as a general rule, automatically closing fire doors that are latched open with electrical controls would release the latch and close the relevant fire doors upon triggering of the fire alarm by any initiating device.
Asked in Fire and Smoke Alarms
What happens to automatic doors when a fire alarm is activated?
Automatic door systems and the fire alarm systems are linked together. Automatic doors are held open by strong magnetic type devices, that are activated(turned on) during normal activity. When the alarm is activated, the devices are shut off and the doors close. These doors are programmed to close in an effort to keep smoke and flames from spreading too far(these doors are usually strongly fire resistant.) Once the alarm is shut off/reset, the devices will be activated again and will remain open once somebody opens the doors back up. Another type of "automatic door" is a fire door that slams shut (springs, counterbalances, gravity, etc) when the heat-sensitive link melts, or when a fire alarm is activated. These heavy doors are NOT intended to be opened during a fire for means of escape, so there must be other doors accessible for people to escape the area safely.
Asked in Law & Legal Issues
Are magnetic lock on exit doors allowed?
Why do you need fire doors?
Fire doors may serve more than one purpose. Many fire doors are part of a fire escape route, arranged so that in the event of a fire you can get out. Such exit fire doors may be a special kind of door that automatically unlocks when there is a fire. As a general rule, however, fire doors are designed to prevent or slow the spread of fire so that people can escape from a burning structure. For example, in a multi-story building it would not be safe to have open stairwells through which fire can easily spread from lower levels to higher levels, so engineers and architects specify self-closing fire doors for protection of stairwell access. The doors may be used for ordinary daily access to the stairs, or for access during an emergency evacuation, or both. Industrial fire doors, on the other hand, may be designed to slam shut during a fire and cannot be marked as a fire exit or used as a fire exit. Other fire doors serving as exits would also be provided.
Should fire door remain open and close only when there is a fire?
This is largely dependant on the security and convenience needs of the building. By code, Fire doors are to be equipped with automatic closers, and if mag-locks are installed to hold them open, they are to release upon activation of the fire alarm system to allow the doors to close properly. Some fire doors are equipped with fusible-links which break when subjected to a certain temperature, and therefore allow the fire door to automatically close, with the desired effect being containing the fire. Fire doors may remain open as necessary in non-fire situations, but must be unobstructed and maintained in working order at ALL times.
Asked in Asian Cars, Nissan Murano
Where is the gas door release relay switch on a 2004 Nissan Murano?
Can you shorten internal fire rated doors?
Yes, you can shorten fire rated doors, but edges have to be re-lipped. Fire doors are tested to keep out fire for a set time (usually 30mins). A 24'' fire door will keep out the fire just as long as a 33'' door, its the construction that matters most, delaying fire going from front of door through to the otherside.
How do fire doors function?
Why do you need to have fire doors?
Asked in Architecture, Buildings
What is technical difference between fire and non fire rated steel doors?
What is a fire door?
a fire door is one term for an access to or from an emergency exit. A fire door is designed to keep smoke and fire from moving from one part of a building to another, and to provide a safe way to escape from a fire. Not all fire doors lead directly outside; some lead to stairs or horizontal passageways, which lead to an exit door, either outside or to a safe area. Fire doors are required for protection of any large openings in a fire wall that separates one part of a building from another. Some industrial fire doors are designed to slam shut during a fire and cannot be opened or used as an exit. There must be, of course, other fire doors that serve as exits. Fire and safety codes generally require that fire doors be of a self-closing type and prohibit propping open or obstructing a fire door for any reason.
What is fire alarm control system?
The fire alarm control system (or control panel) "FACP" is the portion of a fire alarm system that monitors remote sensors, determines when there is an alarm condition, activates the alarm and possible other actions. The FACP can trigger release of fire doors, release exterior locks on access doors or hatches, start or stop ventilation systems, start a fire pump, phone a monitoring center to request the fire department, among other things. One thing a FACP can do in a specific high-hazard occupancy is to start the deluge sprinkler or fire extinguisher system. Ordinary fire sprinklers are heat activated individually.
Why should fire doors never be propped open?
Fire doors should never be propped open (with a fire extinguisher or anything else) because it will defeat the purpose of having fire and smoke separation during a fire. A self-closing fire door must be allowed to function properly for safety of the occupants who may need the extra time to safely escape through other exit doors. It would be a fire-code violation to prop open a fire door, which could result in fines or other discipline.
Asked in Chemistry, Fire Prevention and Protection
Why are there fire doors at school?
Fire doors at school or anywhere else are designed to limit the spread of fire and smoke during an emergency, giving the occupants more time to escape, giving firefighters an easier and safer job of finding and putting out the fire, and reducing the amount of damage caused by a fire. You can be certain that any fire door is there for a very good fire safety reason and you should NEVER block one open for convenience. All fire doors should be self-closing, whether anyone is there or not.