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drain grating , drain grate , trench grating ,We have manufactured STEEL GRATING for many BIG PROJECTS ALL OVER THE WORLD.********************************************Contact information:Person: Iris DengTel :(+86)13957853897, (24 hours)Fax: (+86)57488073962____________________________________________________________Company Simple introduction:We are a leading professional supplier for high quality steel grating for construction project at competitive price, located in Ningbo(near to Shanghai)of China. Our Company has approved ISO9001-2000 Quanlity Management System in 1998. 80% of products is exported to the worldwide.There are manyregular grating customers in USA, MiddleEast, AUS, Europe and Southeast so on.Our Companyis specialized in manufacture and export all kinds of steel gratings with best quality, competitive price and faster delivery time.Such as steel gratingmill black and hot dip Galvanizing and 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. Its Widly used on construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on.Detailed Product DescriptionWe 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 <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) 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.