The Room Layout Of The Tiefbunker
The dividing walls which created the different rooms were cast with a thickness of 50 centimetres. They were only connected to the outer walls by means of three or four steel bars bent out from the steel matrix of the outer walls before the concrete was poured in. The inner walls therefore stood as a kind of free-standing grid, more or less independent from the outer walls of the bunker. In this way it was ensured that should the outer walls shift under a direct hit, they would not take the inner walls with them. The inner walls were essential to prevent the ceiling of steel girders from collapsing, which will be described later.