Abstract: An automated warehouse system with a simple configuration allowing for deployment of a shield wall is provided. The automated warehouse system includes a rack including a plurality of floors each including a plurality of floor panels. The floors permit travel of the transportation robot along surfaces of the floors. The plurality of floors are divided into a first section and a second section spaced with a gap in between. A retreat mechanism establishes a first configuration to be located in the gap to permit the transportation robot to travel between the first section and the second section and a second configuration to retreat from the gap to unclose the gap. When the retreat mechanism establishes the second configuration, a shield wall becomes receivable into the gap, the shield wall shielding the first section and the second section from each other.