Four-ramp stairway system

The detail reproduces a four-ramp stairway system. Each ramp was independent from the other three and thereby proved very useful in dividing the ascending flow of people from the descending one. Such a stairway system proved very functional in a four-storey (military) tower with a square base. Dividing the soldiers flow in castles was very important, in order to allow the soldiers themselves to move weapons faster and without problems. The use of separate ways for different flows is in the Sforza Castle, where the dungeons that surround the moat were divided into two different levels.