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Crash bar
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=== Unlocking and latch hold === In some applications, such as storefront entrances, panic bars may be "[[Dog (engineering)|dogged]]" during business hours. Dogging is a common feature on panic bars in which the bar is retracted with a key, thus freeing the door to operate without latching. This allows customers to apply force to any portion of the door, not just the bar, in order to open it. Dogging is distinct from simple unlocking, which permits the user to open the door from both sides but still requires performing an action to release the latches. However, in applications where the exterior side contains an immovable ''dummy handle'', as opposed to a knob or lever handle, it is usually impossible to unlock the crash bar without also dogging it. Dogging can extend the life of the panic bar mechanism. Some bars can be unlocked/dogged electronically, while others take a cylinder lock, [[hex key]], or contain no key functionality at all. <ref>{{Cite web|title=Exit Devices: Dogging Options|url=https://www.beaconcdl.com/exit-devices-dogging-options/|access-date=2020-06-03|language=en}}</ref> Dogging should be avoided in high wind areas where the door is susceptible to blowing open.
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