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Door closers that are mounted in the floor directly under the pivot point beneath a decor plate are referred to as floor springs and come in two variations, single action for doors opening one way (right and left hand) and double action for doors that open inward and outward, both types can either be none hold open (NHO) or hold open (HO).
A doorstop (also door stopper, door stop or door wedge) is an object or device used to hold a door open or closed, or to prevent a door from opening too widely. The same word is used to refer to a thin slat built inside a door frame to prevent a door from swinging through when closed.
Wall-mounted electromagnetic door holder securing a door in the open position. An electromagnetic door holder (electromagnetic door holder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop) is a simple electromechanical mechanism which can be used to hold a fire door or security door open until given a signal to release.
Since electromagnetic locks do not interact with levers or door knobs on a door, typically a separate release button that cuts the lock power supply is mounted near the door. This button usually has a timer that, once the button is pressed, keeps the lock unlocked for either 15 or 30 seconds in accordance with NFPA fire codes.
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Approach side, door mounted sensor—mounted on the approach side of the door itself, used as the door is closing to detect a user in the way of the closing door. Some safety sensor also safeguard the hinge area to protect hands and fingers during the closing process. In that case, the operator either stops the door or reopens it. Swing side ...
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