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An in-floor safe installed in a concrete floor is very resistant to fire. However, not all floor safes are watertight; they may fill with water from fire hoses. Contents can be protected against water damage by appropriate packaging. Reinforced, fireproof cabinets are also used for dangerous chemicals or flammable goods.
When the U.S. government began building bunkers and silos during the Cold War, Mosler became the contractor for blast doors. One set, installed at the Atomic Energy Commission 's Oak Ridge National Laboratory [ 3 ] : 47 in 1961, weighed approximately 65 tons per door, and were considered the heaviest doors installed in the United States at ...
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.
The vault door is also molded of special concrete used to make the panels, but it can be made in several ways. The door mold differs from the panel molds because there is a hole for the lock and the door will be clad in stainless steel. Some manufacturers use the steel cladding as the mold and pour the concrete directly into it.
A revolving door typically consists of three or four doors that hang on a central shaft and rotate around a vertical axis within a cylindrical enclosure. To use a revolving door, a person enters the enclosure between two of the doors and then moves continuously to the desired exit while keeping pace with the doors.
A sliding glass door, sometimes called an Arcadia door or patio door, is a door made of glass that slides open and sometimes has a screen (a removable metal mesh that covers the door). Australian doors are a pair of plywood swinging doors often found in Australian public houses.