Structure unit

A structure unit comprising:

• a first structure having a shape elongated in a first direction;
• a second structure having a shape elongated in a second direction;
• and
• a structure coupling portion capable of detachably coupling the first structure and the second structure to each other in a coupling allowable state in which the first direction and the second direction extend in horizontal reference directions, respectively, and the first structure is disposed on the second structure,
• wherein the structure coupling portion includes:
• a first coupling portion attached to the first structure;
• a second coupling portion attached to the second structure;
• and
• a coupling pin that couples the first coupling portion and the second coupling portion to each other,
• the first coupling portion includes:
• a first pin receiving portion provided with a first hole portion capable of receiving the coupling pin along an insertion direction that is a direction intersecting the reference direction;
• and
• a load transmitting portion configured to be attachable to the first structure integrally with the first pin receiving portion and to transmit a self-weight of the first structure to the second coupling portion, and
• the second coupling portion includes:
• a second pin receiving portion provided with a second hole portion capable of receiving the coupling pin inserted into the first hole portion in the coupling allowable state along the insertion direction;
• a load receiving portion configured to be attachable to the second structure integrally with the second pin receiving portion and to support the load transmitting portion so as to receive the self-weight of the first structure;
• and
• a restraining portion that restrains the first coupling portion in the reference direction such that the first hole portion and the second hole portion match with each other in the insertion direction in a state where the load receiving portion supports the load transmitting portion.