The S4 truss is a type of structural framework commonly used in engineering and construction. It consists of straight members connected at joints, forming a triangular pattern that distributes loads efficiently. This design helps to provide stability and strength, making it suitable for bridges, roofs, and other structures. The S4 truss is characterized by its four main members, which create a rectangular shape. This configuration allows for effective load-bearing capabilities while minimizing material use. Engineers often choose the S4 truss for its balance of strength and lightweight properties, making it a popular choice in various construction projects.