Article storage facility and method of controlling article transportation

An article storage facility comprising:

• a plurality of storage compartments provided along a transportation path extending in a direction intersecting with a first direction, each of the plurality of storage compartments including
• a first storage spot configured to store a first article;
• and
• a second storage spot located on an opposite side of the transportation path with respect to the first storage spot in the first direction and configured to store the first article;
• a first transportation mechanism including a first support configured to support and transport the first article along the transportation path, the first transportation mechanism being configured to transport the first article between:
• each one of the first and the second storage spots;
• and a first support spot where the first article is supported by the first support in the transportation path;
• a second transportation mechanism including a second support configured to support and transport the first article along the transportation path, the second transportation mechanism being configured to transport the first article between:
• each one of the first and the second storage spots;
• and a second support spot where the first article is supported by the second support in the transportation path;
• and
• a controller configured to control transportation of the first article by the first transportation mechanism and the second transportation mechanism, wherein the controller is configured to allocate a third storage spot in one of the plurality of storage compartments to and from which both of the first transportation mechanism and the second transportation mechanism are able to transport the first article, as at least one of
• a first evacuation spot to which the first transportation mechanism evacuates a second article in a case where the second article is placed in the first storage spot located between the first support spot and the second storage spot when transporting the first article between the first support spot and the second storage spot by the first transportation mechanism,
• a second evacuation spot to which the second transportation mechanism evacuates the second article in a case where the second article is placed in the first storage spot located between the second support spot and the second storage spot when transporting the first article between the second support spot and the second storage spot by the second transportation mechanism, and
• a relay spot where the first article is supported while the first article is passed between the first transportation mechanism and the second transportation mechanism.