... made of U25 U29 U36 steel 3.ISO, SGS Certification U Steel Arche clamps for Mining U type steel support main purpose: for mine ... support, and mountain tunnel support .U25,U29,U36 type steel frame.U Steel Arche clamps for Mining:1.Spec.: 25U, 29U, 36U 2 ... steel 2, spreader bar : to connect one steel arches to another one The below is our samples of U steel arches U Steel Arche clamps ...