Structure

A structure comprising a structural member configured like a frame with four sides, wherein:

• a closed cross-section structural member is provided in a corner formed by crossing between each of opposite ends of a predetermined side subjected to a load and a second side so as to extend along an outer-peripheral flat surface of the predetermined side and an outer-peripheral flat surface of the second side,
• the closed cross-section structural member comprises two horizontal portions separated from each other in a thickness direction of the frame-like structural member and extending in an in-plane direction of the frame-like structural member, a vertical portion connecting first ends of the two horizontal portions together, and a vertical portion connecting second ends of the two horizontal portions together, and the closed cross-section structural member comprises a first opening formed therein facing the outer-peripheral flat surface of the frame-like structural member and a second opening formed therein facing outside of the frame-like structural member,
• a part of an opening edge of the first opening corresponding at least to the two vertical portions is joined to the outer-peripheral flat surface of the frame-like structural member, and
• a flattening that is a ratio of a maximum width of the second opening to a height of the closed cross-section structural member is greater than 1.0 and not greater than 6.0.

A structure comprising a structural member configured like a frame with four sides, wherein:

• a closed cross-section structural member is provided in a corner formed by crossing between each of opposite ends of a predetermined side subjected to a load and a second side so as to extend along an inner-peripheral flat surface of the predetermined side and an inner-peripheral flat surface of the second side,
• the closed cross-section structural member comprises two horizontal portions extending in an in-plane direction of the frame-like structural member at a predetermined height position in a thickness direction of the frame-like structural member, two vertical portions connected to ends of the two horizontal portions, and a connection portion connecting the two vertical portions together, and the closed cross-section structural member comprises a first opening formed therein facing the inner-peripheral flat surface of the frame-like structural member and a second opening formed therein facing inside of the frame-like structural member,
• a part of an opening edge of the first opening corresponding at least to the two vertical portions is joined to the inner-peripheral flat surface of the frame-like structural member, and
• a flattening that is a ratio of a maximum width of the second opening to a height of the closed cross-section structural member is greater than 1.0 and not greater than 3.0.

A structure comprising a structural member configured like a frame with four sides, wherein:

• a closed cross-section structural member is provided in a corner formed by crossing between each of opposite ends of a predetermined side subjected to a load and a second side so as to extend along an outer-peripheral flat surface of the predetermined side and an outer-peripheral flat surface of the second side,
• the closed cross-section structural member comprises a horizontal portion extending in an in-plane direction of the frame-like structural member at a predetermined height position in a thickness direction of the frame-like structural member, two vertical portions connected to ends of the horizontal portion, and a connection portion connecting the two vertical portions together, and the closed cross-section structural member comprises a first opening formed therein facing the outer-peripheral flat surface of the frame-like structural member and a second opening formed therein facing outside of the frame-like structural member,
• a part of an opening edge of the first opening corresponding at least to the two vertical portions is joined to the outer-peripheral flat surface of the frame-like structural member, and
• a flattening that is a ratio of a maximum width of the second opening to a height of the closed cross-section structural member is greater than 1.0 and not greater than 6.0.