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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.
Frederick S. Holmes was an American safe and vault engineer, [1] and inventor who designed the largest vaults in the world. During his career, Holmes designed over 200 vaults throughout the United States, Canada and Japan from 1895 [2] to 1941.
The subterranean vault is made of steel plates, I-beams and cylinders encased in concrete. Its torch-and-drill resistant door is 21 inches (53 cm) thick and weighs 20 short tons (18 metric tons). The vault door is set on a 100-hour time lock, and can only be opened by members of the depository staff who must dial separate combinations. Visitors ...
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Mosler built the vault formerly used to display and store the Charters of Freedom: the US Constitution, Declaration of Independence, and the Bill of Rights. Mosler also built the gold vaults for the United States Bullion Depository at Fort Knox. [1] [9] Despite the weight, each 58-ton blade could be opened and closed manually by one person. [10 ...
This door has a four-point system for pressing the door into its opening (note the two stanchions left of the door opening) capable of exerting one third of the door's weight in closing force. Since this door weighs 22.5 short tons (20.4 t) this system is capable of applying 7.5 short tons-force (67 kN) inward.
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