Box-shaped building unit and building

A box-shaped building unit comprising an orthogonal panel joining structure, the orthogonal panel joining structure comprising a first CLT panel, a second CLT panel orthogonal to the first CLT panel, and a joining member, and

• having a structure wherein a surface of end of lumber or a surface of edge of lumber of the second CLT panel is made abut on an inner main surface of the first CLT panel and joined thereto by the joining member so that a surface of end of lumber or a surface of edge of lumber of the first CLT panel and an outer main surface of the second CLT panel are flush,
• a joining part by the joining member having a structure wherein the surface of end of lumber or the surface of edge of lumber and the inner main surface and an outer main surface of the first CLT panel are opened so that the outer main surface side of the first CLT panel is wider than the inner main surface side of the first CLT panel, wherein the surface of end of lumber or the surface of edge of lumber and at least the outer main surface of the second CLT panel are opened so that the inner side of the second CLT panel is wider than the surface of end of lumber or surface of edge of lumber side of the second CLT panel, and wherein the joining member is inserted into an opening of the first CLT panel and an opening of the second CLT panel from the surface of end of lumber or surface of edge of lumber of the first CLT panel and the outer main surface of the second CLT panel side,
• comprising a ceiling surface CLT panel constituting a ceiling surface and a side wall surface CLT panel constituting a side wall surface,
• wherein the side wall surface CLT panel comprises a first side wall CLT panel, a second side wall CLT panel, a third side wall CLT panel, and a fourth side wall CLT panel that constitute first to fourth side wall surfaces of the box-shaped building unit, respectively,
• wherein the first side wall CLT panel is joined with each of the second side wall CLT panel and the fourth side wall CLT panel by the orthogonal panel joining structure,
• wherein the third side wall CLT panel is joined with each of the second side wall CLT panel and the fourth side wall CLT panel by the orthogonal panel joining structure,
• wherein the ceiling surface CLT panel and each of the first side wall CLT panel, the second side wall CLT panel, the third side wall CLT panel, and the fourth side wall CLT panel are joined by the orthogonal panel joining structure,
• wherein the first side wall CLT panel comprises a first side wall CLT panel on one side and a first side wall CLT panel on the other side that join the ceiling surface and a bottom surface of the box-shaped building unit at least with both sides of the first side wall surface,
• wherein the second side wall CLT panel comprises a second side wall CLT panel on one side and a second side wall CLT panel on the other side that join the ceiling surface and the bottom surface of the box-shaped building unit at least with both sides of the second side wall surface,
• wherein the third side wall CLT panel comprises a third side wall CLT panel on one side and a third side wall CLT panel on the other side that join the ceiling surface and the bottom surface of the box-shaped building unit at least with both sides of the third side wall surface,
• wherein the fourth side wall CLT panel comprises a fourth side wall CLT panel on one side and a fourth side wall CLT panel on the other side that join the ceiling surface and the bottom surface of the box-shaped building unit at least with both sides of the fourth side wall surface,
• wherein the first side wall CLT panel on the other side and the fourth side wall CLT panel on one side are joined by the orthogonal panel joining structure,
• wherein the second side wall CLT panel on the other side and the first side wall CLT panel on one side are joined by the orthogonal panel joining structure,
• wherein the third side wall CLT panel on the other side and the second side wall CLT panel on one side are joined by the orthogonal panel joining structure,
• wherein the fourth side wall CLT panel on the other side and the third side wall CLT panel on one side are joined by the orthogonal panel joining structure.