... x 5 x 3, 38 x 5 x 3, 40 x 5 x 3, 50 x 5 x 3, ... (center to center): 12.5, 15, 25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32, ... mm etc, also be according to client's requirement and 30, 40, 60mm are recommended, America standard is available3) Cross Bar ... (Low Carbon Steel) or Stainless Steel5) Surface Treatment: Untreated, Painting or Hot dip Galvanizing6) Steel grating standards: A) China: YB ...