... steel grating 2.Metal grating 3.ASTM A123,SS400 4.Common pitch:30mm&40mm 5.Used in flooring,walkway A ... standard is also available <1'' x 3/16'', 1 1/4'' x 3/16'', 1-1/2'' x 3/16'', ... 1'' x 1/4'', 1-1/4'' x 1/4'', 1 1/2'' x 1/4''(19-w-4), (11-w-4), (8-w-4) and so on.> ... and 50, 100mm are recommended, America standard is available. 4) Material:Mild Steel (Low Carbon Steel) or Stainless Steel ...