Strong room for building - has walls incorporating bomb and drill resistant concrete between inner and outer steel sheets

摘要

The strong room has walls which are made up of inner (A) and outer (C) sheets of steel sandwiching bomb (H) and drill (K) resistant concrete. Access to the room is effected through a door (N) mounted in a steel frame (D). The strong room is installed before concrete is cast into the interstices between the inner and outer steel sheets. The outer sheet may only extend on the exposed walls, if the strong room is installed in the corner of a building.