Patent ID: 8336260

Claim:
An apparatus for securing an access corridor to a high security facility, comprising: a door passage intersecting the access corridor, and delineating a secure side of the access corridor on one side of the door passage, and a threat side of the access corridor on the other side of the door passage; a penetration resistant door disposed within the passage, and oriented with a front surface of the door facing a front wall of the passage and the threat side of the access corridor, and a back side of the door facing a back wall of the passage and the secure side of the access corridor; a system for translating the door within the door passage between an open position in which the access corridor is unblocked, and a closed position in which the door blocks the access corridor, the perimeter of the door extending into the passage beyond the walls of the corridor in the closed position; and a locking system in the passage configured to push the door toward the front wall of the passage, the locking system comprising at least two actuated bolts, sockets in the door configured to receive an end of the bolts, and a shim stack between the ends of the bolts and the door.