Mild Steel Sag Rod is a type of tension-only support used in the construction industry to provide additional stability and prevent sagging in structural elements. The sag rod is typically made of mild steel and is installed in tension between two points to provide additional support. Mild Steel Sag Rod works by exerting a force in the opposite direction of the sagging force, effectively counteracting it and preventing the structure from sagging or deforming. These rods are commonly utilized in commercial and industrial buildings, bridges, and other large structures that require additional support to maintain structural integrity.