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  2. You Might Be Using Your Door Stoppers Wrong: Here's How ... - AOL

    www.aol.com/might-using-door-stoppers-wrong...

    The way to do it is easy; some even say embarrassingly so. Using your hand or foot, bend the door stop down and push the door back towards the wall as far as you can. Note that your hand or foot ...

  3. Doorstop - Wikipedia

    en.wikipedia.org/wiki/Doorstop

    Doorstop. 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. A doorstop (applied) may also be a small bracket ...

  4. Medieval fortification - Wikipedia

    en.wikipedia.org/wiki/Medieval_fortification

    Medieval fortification refers to medieval military methods that cover the development of fortification construction and use in Europe, roughly from the fall of the Western Roman Empire to the Renaissance. During this millennium, fortifications changed warfare, and in turn were modified to suit new tactics, weapons and siege techniques.

  5. Firestop - Wikipedia

    en.wikipedia.org/wiki/Firestop

    Firestop. A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Firestops are designed to maintain the fire-resistance rating of a wall or floor assembly intended to impede the spread of fire and smoke. [1]

  6. Door security - Wikipedia

    en.wikipedia.org/wiki/Door_security

    Door security. A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home ...

  7. Electromagnetic door holder - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_door_holder

    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. A fire alarm control panel or a similar emergency ...

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