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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. Door security is used in commercial and government buildings, as well as in residential settings.
New exterior doors are largely defined by the type of materials they are made from: wood, steel, fiberglass, UPVC/vinyl, aluminum, composite, glass (patio doors), etc. A neoclassical wooden iron door in the Palace of São Cristóvão , the former main residence of the Brazilian imperial family with gilded imperial cyphers of Emperor Pedro II of ...
Utilizing a breaching tool is unnecessary if the door is unlocked and easy to open. [5] [3] [6] [1] If the door is locked, breachers can attempt to force inward-opening doors with a strong kick. The breacher will aim to hit the door near the locking mechanism, but not kick the doorknob itself as one can easily twist an ankle doing so. [7]
Fiberglass doors are commonly used near an ocean, where salt water can ruin regular steel doors. Steel doors have a variety of sizes and styles, provide strength and security, are cost-competitive, and may have optional insulating value. Extra strength is available with two or three layers of galvanized steel with a low gauge number (0.6 - 0.7 ...
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The first reported metallic glass was an alloy (Au 75 Si 25) produced at Caltech by W. Klement (Jr.), Willens and Duwez in 1960. [5] This and other early glass-forming alloys had to be cooled extremely rapidly (on the order of one mega kelvin per second, 10 6 K/s) to avoid crystallization. An important consequence of this was that metallic ...
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