Features Specifications:Sell steel grating, grating fence, bar grating, Galvanizing grating  manufacturer and exporter of steel grating, grating fence, bar grating, Galvanizing grating for Ningbo Famous Tianyi Square.  This company is specialized in manufacture and export all kinds of steel gratings with the best quality, competitive price and faster delivery time. Such as steel gratingmill black and hot dip Galvanizingand stainless grating flooring walkway, platform and steel structures, stair tread, well cover, trench cover, compound gratings, storage shelves, ladder, fences, handrail and cable bridge so on for construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on. We have great interest in developing business with you, should you have any inquiries or comments, we would be glad to talk in details through MSN Email:, Mobile:008613757445098, TEL:008657488073967, Fax: 008657488073962, Contact person: David Huang.  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 platforms, 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) Specifications (mm):  The specification of plain type and serrated type bearing bar is 20 x 3 to 100 x 10; the specification of I-section type is 25 x 5 x 3, 32 x 5 x 3, 38 x 5 x 3, 40 x 5 x 3, 50 x 5 x 3, 50 x 7 x 4, 55 x 7 x 4, 60 x 7 x 4, 65 x 7 x 4, 70 x 7 x 4, 75 x 7 x 4, 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, 100 mm etc, also be according to client's requirement but 30, 40, 60mm are recommended. America standard is available  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 Steel (Low Carbon Steel ASTM A36 or Q235) or Stainless Steel 304 or 316  5) Surface Treatment:  Untreated, Painting or Hot dip Galvanizing  6) Steel grating standards:  A) China: YB/T4001-1998  B) USA: ANSI/NAAMM (MBG531-88)  C) UK: BS4592-1987  D) Australia: AS1657-1985  E) Japan: JJS.