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2. Door - Wikipedia

   en.wikipedia.org/wiki/Door

   If the hinges are on the right then it is a right hand (or right hung) door. (Australian Standards for Installation of Timber Doorsets, AS 1909–1984 pg 6.) In public buildings, exterior doors open to the outside to comply with applicable fire codes. In a fire, a door that opens inward could cause a crush of people who cannot open it. [22]

3. Revolving door - Wikipedia

   en.wikipedia.org/wiki/Revolving_door

   Revolving door is flanked on both sides by conventional doors with arrows pointing inward towards the preferred entry. H. Bockhacker of Berlin was granted German patent DE18349 [ 7 ] on December 22, 1881 for Tür ohne Luftzug or ' Door without draft of air ' , which used a rotating cylinder with a door which after entering, the user then turned ...

4. Wicket gate - Wikipedia

   en.wikipedia.org/wiki/Wicket_gate

   In the Middle Ages the narrow doors in the city walls also enabled late arrivals to gain entry after the main gates had been closed. [1] If the small entrance in the door of a large gate has a high threshold, it may be called a manway. If it is a separate, narrow entrance next to the main gate, it may be called a pedestrian entrance.

5. Category:Types of gates - Wikipedia

   en.wikipedia.org/wiki/Category:Types_of_gates

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6. Top home security upgrades that can lower your homeowners ...

   www.aol.com/finance/home-security-upgrades-lower...

   Impact-resistant windows typically cost upward to $1,000 each, while impact-resistant doors can easily cost $1,500 and up per door. Depending on how many windows and doors you update, these ...

7. Door security - Wikipedia

   en.wikipedia.org/wiki/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 invasions. Door ...