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A crash bar (also known as a panic exit device, panic bar, or bump bar) [1] [2] is a type of door opening mechanism which allows users to open a door by pushing a bar. While originally conceived as a way to prevent crowd crushing in an emergency, crash bars are now used as the primary door opening mechanism in many commercial buildings.
In the US, UL rated doors must retain their rating: in new construction doors are cored and then rated. but in retrofits, the doors must be re-rated. Electrified exit hardware, sometimes called "panic hardware" or "crash bars", are used in fire exit applications. A person wishing to exit pushes against the bar to open the door, making it the ...
The device will either block the main boltwork from retracting or block the door from opening. Glass relockers are one of the most common types of relockers used in today's safes. Relockers are typically designed for one-time activation, meaning that once they are triggered the device is locked "permanently" and can only be opened by brute force.
Locking device on doors used for delaying opening for short period (10–15 seconds) after release is pressed. Permitted as panic hardware in limited circumstances. May also refer to a security system that releases electronic door locks when a fire alarm is activated, such as in stairwells of a high-rise building. Spray nozzle See fog nozzle.
Metal fire-resistance rated door with a lockset consisting of a locking latch bolt operated by lever handle with an escutcheon that encompasses the locking mechanism.. A lockset (alternatively lock set) is the hardware and components that make up the locking or latching mechanism that can usually be found on a door or other hinged object but can also include sliding doors and dividers. [1]
Historically, such locks were intended for use at night-time, hence the name. [5] The keyless egress that they offer is a valuable fire safety measure, but may be a security risk if breaking a glass panel (usually in the door) or a nearby small window allows an intruder to reach the knob inside and open the door from the outside.
Numerous devices exist to serve specific purposes related to how a door should (or should not) be used. See: Door chain - A device to secure door opening; Door closer – Mechanical or electromagnetic device to close an open door (in the event of a fire) [3] Door opener - Automatic door opening device activated by motion sensors or pressure pads
Espagnolette locking device. An espagnolette is a locking device, normally mounted on the vertical frame of a French door or casement window.A handle or knob is connected to a metal rod mounted to the surface of the frame, about a metre above the floor.