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Galvanized Steel Grating: bearing bar:25x3,25x4,30x3mm bearing bars pitch:30,60,90mm cross bar:6mm,8mm c bar pitch:50,100mm We produce three kinds of steel gratings, they are Plain Style Steel Grating, Serrated Style Steel Grating and I Bar Type Steel Grating. They are widely used in steel structure jplatform, stair treads, sidewalks, drainages and well covers etc. we can design and manufacture standard steel grating and in customized shapes per client’s requirements. 1)Bearing Bar (load Bar) specification (mm): The specification of plain type and serrated type bearing bar is 20x3 to 100x10, the specificationof 1-section type is 25x5x3, 32x5x3,40x5x3, 50x5x3, 50x7x4,55x7x4, 60x7x4,65x7x4,70x7x4, 75x7x4,etc 2)Bearing Bar Pitch (center to center): 12.5,15,25,30,30.16,32.5,34,40,41.25,45,50,60,60.32,80,100mmetc,also be according to client’s requirement and 30,40,60mm are recommended. America standard is also available :1”x3/16”,1 1/4”x3/16”, 1 1/2”x3/16”, 1”x1/4”, 1 1/4”x1/4”, 1 1/2”x1/4”(19-w-4),(11-w-4),(8 –w-4) and so on. 3) Cross Bar Pitch(center to center): 38,50,76,100,101.6mm,etc, also be according to client’s requirement and 50,100mm are recommended, America standard is available 4) Material; Mild stee l(Low Carbon Steel) or Stainless Steel 5) surface Treatment: Untreated, Painting or Hot dip Galvanized 6) Steel grating standards: A) China: YB/T4001-1998 B) USA: ANSI/NAAMM (MBG531-88) C) UK: BS4592-1987 D) Australia: AS 1657-1985 E) Japan: JJS /