Steel struts are core support components in foundation pit and tunnel engineering. They are typically fabricated from Q235B or Q355B steel pipes and consist of fixed sections, movable sections, joints, jack supports, and other components. Their length can be adjusted freely, and pre-applied axial force can be exerted during construction to effectively control deformation of foundation pit and tunnel side walls and ensure excavation safety. The product features high rigidity, strong load-bearing capacity, fast installation and removal, and a surface that can be treated with anti-corrosion paint. It is widely used in municipal civil engineering support projects such as subway tunnels, deep foundation pits, and underground utility tunnels. As a recyclable and reusable building material, it is energy-saving and environmentally friendly.