Which structural element is used to resist tension?

The use of ties as structural elements is primarily to resist tension forces within a structure. Ties are typically employed in tension applications, meaning they are designed to withstand pulling forces without failing. They are commonly found in structures such as trusses, where they connect different members and help distribute loads effectively.

In contrast, braces, while they provide lateral support and stability, are primarily designed to resist compressive forces rather than tensile forces. Columns, on the other hand, are vertical members that primarily support compressive loads and are not intended to take up tensile stresses. Beams are horizontal members that primarily resist bending and shear and may experience tension in certain situations, but they are not specifically designed as tension-resisting elements.

Thus, ties are the appropriate structural element for effectively resisting tension, making them the correct choice.