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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]
The fortified doors and walls protect the occupants so they can summon help using a mobile or land-line phone. Doors and walls can be reinforced with steel, Kevlar, sound-proof or bullet-resistant fiberglass panels. The door to the safe room can be concealed by panels that match existing walls or doors in the home.
A device whereby a safe-looking safe is left open but has a hidden compartment (e.g., in the door) where small valuable articles can be hidden. As an alternative variant, a safe may be "stocked" with some lesser valuables, with the expectation that it will be burgled, but that the real safe or hiding place for the important valuables will be ...
A hidden compartment where people can stay is usually referred to as a hidden room or secret room, and can range from parts of small wardrobes or closets under staircases to entire basements or even large mountain complexes. Hidden rooms are often accessed via a hidden door, which for example can be camouflaged as a bookshelf or a trapdoor in
Entrance to HM Prison Edinburgh. A mantrap, security mantrap portal, airlock, sally port or access control vestibule is a physical security access control system comprising a small space with two sets of interlocking doors, such that the first set of doors must close before the second set opens.
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Concealed shoes have been discovered in many types of building: country cottages, town houses, manor houses, hospitals, workhouses, factories, public houses, and two Oxford colleges, St John's and Queen's. They have even been found in ecclesiastical buildings, including a Benedictine monastery in Germany and a Baptist church in Cheshire ...
Building automation (BAS), also known as building management system (BMS) or building energy management system (BEMS), is the automatic centralized control of a building's HVAC (heating, ventilation and air conditioning), electrical, lighting, shading, access control, security systems, and other interrelated systems. Some objectives of building ...