Rectangle

The solid rectangular structural shape is defined by four sides with opposite sides being equal in length, meeting at right angles, and a completely filled cross-section. Its primary advantage lies in its differing bending strengths about its major and minor axes, allowing for optimised orientation based on load direction. It offers good compressive strength and is commonly used for beams (when oriented to maximise moment resistance), columns, lintels, and other load-bearing elements in construction.