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When you think of door stoppers, you likely picture the spring-loaded type located on the baseboard that is designed to stop the doorknob from hitting the wall. But it turns out, preventing damage ...
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 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
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 invasions.
In life safety and security applications, electromagnetic door holders must be very reliable; the simplicity of the mechanisms helps considerably. They are designed to be fail-safe in that anything interfering with their operation (such as a power failure) will cause them to release the doors and allow them to close.
A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems. [2]