... made by welding with flat steel and bars with certain distances. It goes through cutting, opening, edging and other processes. The products enjoy ... of gratings fit for fixed platforms, walkway, and stair treads and British, German,French and Japanese standards are available. The products most ... -2 etc. 3Twisted Cross Bar Pitch38.1, 50, 60, 76, 80, 100, 101.6, 120mm, 2'' & 4'' etc 4Material GradeASTM ...