Protective outside wall for bank or other building which may be attacked by missiles or ram raiders, consists of folded steel plate sandwiched between steel walls

摘要

The wall structure (1) is about 50 mm thick (15) made from steel plate (3). The hollow wall has flat steel plates at front (2) and rear (8). A zig-zag folded plate (4) between the front and rear provides extra strength. If the wall is hit by an impact, much of the force can be absorbed, when the angled relief zones (5) bend.