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2. Vestibule (architecture) - Wikipedia

   en.wikipedia.org/wiki/Vestibule_(architecture)

   Designers of commercial buildings must install a vestibule between the main entry doors leading to spaces that are greater than or equal to 3,000 square feet (280 m 2). One other requirement of the design is that it is not necessary for both sets of door to be open in order to pass through the vestibule, and they should have devices that allow ...

3. Door - Wikipedia

   en.wikipedia.org/wiki/Door

   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 ...

4. 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 ...

5. Genkan - Wikipedia

   en.wikipedia.org/wiki/Genkan

   It is usually located inside the building directly in front of the door. The primary function of genkan is for the removal of shoes before entering the main part of the house or building. A secondary function is a place for brief visits without being invited across the genkan step into the house proper. [2]

6. Mantrap (access control) - Wikipedia

   en.wikipedia.org/wiki/Mantrap_(access_control)

   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.

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.