Closed Hollow Sections are one of the most common and diversified structural steel products. It should be ensured that the ends of hollow sections are always closed. If any ends of a hollow section do not get closed due to more width, then a plate is welded on that end so that the ends get closed, and also the connection with other members is made good by effective sealing of the members. Closed Hollow Sections refer to high-strength welded steel tubing used as structural elements in buildings and other structures and a variety of manufactured products.