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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.
A typical "handle set" is composed of the exterior handle, escutcheon, an independent deadbolt, and the interior package (knob or lever). On some doors the latch is incorporated into a hinged handle that releases when pulled on. See also: Doorknob – A knob or lever on an axle that is rotated to release the bolt; Crash bar or Panic bar; [3 ...
Mortise locks may include a non-locking sprung latch operated by a door handle. Such a lock is termed a sash lock. A simpler form without a handle or latch is termed a dead lock. Dead locks are commonly used as a secure backup to a sprung non-deadlocking latch, usually a pin tumbler rim lock. [note 1] [according to whom?]
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]
Any fire doors which are normally held open must automatically close and lock when a fire is present in the building. The function of an emergency exit rim device (crash bar or panic bar) will permit escape through a fire door, however it must re-latch once released. (A fire door must not be "dogged" to disable its latch.)
Founded in 1981, [3] Emtek began making a limited range of solid brass door levers for specialty hardware dealers in the Los Angeles area; they are now distributed through all of North America. Based in City of Industry , it has three facilities for product assembly, shipping, management, and customer service.
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.
Door chains — allows the doors to be opened slightly to view outside while still remaining locked. Secondary, internal locks — sliding bolts, hooks and speciality latches, metal blocks or bars mounted internally. Hinge screws — longer or specialized screws that prevent the door from being simply pulled out after removing the hinge pins.
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