Patent ID: 8061105

Claim:
A projected corner structure for a building, comprising at least two upright columns which are rectangular in cross section and which are disposed in proximity to each other on a diagonal line, and a corner upright column which includes an outer surface shaped in the form of a circular arc and which is fixed upright in a fitting state in a clearance which is formed on an outer side between the two upright columns and which is triangular in cross section; wherein the two upright columns are first and second upright columns arranged diagonally to form the clearance in the form of a reentrant corner formed by a first flat side of the first upright column and a first flat side of the second upright column, the first flat sides of the first and second upright columns extending to a reentrant edge of the reentrant corner; wherein the corner upright column includes a sectorial portion, which has a sectorial cross section shaped in the form of a sector of a circle, which is inserted fittingly into the reentrant corner and which includes: an apex pointing to the reentrant edge, a first lateral side extending from the apex toward a first end of the outer surface of the corner upright column and abutting on the first flat side of the first upright column, a second lateral side extending from the apex toward a second end of the outer surface and abutting on the first flat side of the second upright column, and the outer surface, which is a curved outer surface extending curvedly from the first end to the second end in the form of a circular arc forming the sectorial cross section with the first and second lateral sides, and extending circumferentially from the first end to the second end; and wherein the projected corner structure further comprises a first underlay member extending in a first direction, and a second underlay member extending in a second direction, and the corner upright column includes a first projecting portion projecting from the first lateral side of the sectorial portion in the first direction, to an end confronting an end of the first underlay member, and including an outer surface extending continuously from the first end of the curved outer surface to an outer surface of the first underlay member, and a second projecting portion projecting from the second lateral side of the sectorial portion in the second direction, to an end confronting an end of the second underlay member, and including an outer surface extending continuously from the second end of the curved outer surface to an outer surface of the second underlay member.