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Yett hanging in the main entrance of Blackness Castle, Scotland, showing attached bolts and pierced construction.Wrought in 1693. [1]A yett (from the Old English and Scots language word for "gate") [2] is a gate or grille of latticed wrought iron bars used for defensive purposes in castles and tower houses. [3]
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 ...
A United States Government Class 5-B vault door, which has been tested and approved by the Government under Fed. Spec. AA-D-600D, is ballistic resistant and affords the following security protection: 20 man-hours against surreptitious entry. 30 man-minutes against covert entry. 10 man-minutes against forced entry.
Storm door, Japan. A storm door is a type of door that is installed in front of an exterior access door to protect it from bad weather and allow ventilation.Storm doors generally have interchangeable glass panels and window screen panels to provide visibility and prevent flying insects from entering the home.
Crash bars are fitted to these types of doors because they are proven to save lives in the event of human crushes. Panic can often occur during mass building evacuations caused by fires or explosions. In the event emergency exits are required, the crash bar works efficiently to allow people to pass through security doors without a reduction in ...
Yale Chilled Iron Vaults and Safes. Yale's other significant invention is the Chilled Iron Bank Doors and Vaults. Previous bank doors, vaults, and safes had plates of hard cast behind soft wrought iron, which can be easily broken using the right amount of leverage and skillful vault-picking.
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