bar grating well cover

Bar gratingstair tread Raw Material: Steel grating is made of flat steel and bars by welding with certain distances. It goes through cutting, opening, edging and other processes. Features: The products enjoy the features of high strength, light structure, high bearing, convenience for loading and other properties. Finish:The hot dipped zinc coating gives the product excellent anti-corrosion resistance. Application: Steel grating is widely used in the platform, corridor, bridge, well covers, stairs, fencing for petroleum, chemical, power plant, waste treatment plant, civil engineering projects and environmental projects. ISO9001-2000, GRATING SPECIALIST, YOUR GRATING SOLUTIONS! ----------------------------------------------------------------------------------------------- Contact Information: TEL: +86 318 7865366, Fax: + 86 318 7865366, ================================================================ We are a leading professional manufacturer of high quality steel grating for construction project at competitive price, located in ANPING near Neijing China. Guorun metal products company has approved ISO9001-2000 Quanlity Management System in 1998. 60% of products is exported to the worldwide with perfect quality.There are many regular grating customers in USAHouston, Ohio, Charttle, LA, MiddleEast, AUS, Europe and Southeast so on. 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 steelmill 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 and handrail so on for construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on. 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 and 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) and so on.> 4) Material: Mild Steel (Low Carbon Steel) or Stainless Steel 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.