Circle

The solid circular structural shape has a completely filled, round cross-section. Its key characteristic is isotropic behaviour in bending, meaning its resistance to bending is uniform in all directions perpendicular to its axis. It possesses good compressive strength and is also effective in resisting torsional loads, although hollow circular sections are generally more efficient for torsion per unit of material. Common applications include shafts, pins, columns, and foundation piles.