Steel grating is welded by the world first-class equipment,which can arrange the bearing bar and cross bar in longitude and latitude order to certain distance.cross bar is pressed into the bearing bar by high tension resistance weldingring which is controlled by computer.so we can produce high quality gratings withfirm welding,smooth surface and high strength.
1. material: low carbon steel,mid steel or stainless steel
2. Surface Treatment: Untreated, Painting or Hot dip Galvanizing
3. Specification of steel grating
(1)The shape of bearing bar: Plain type (may be omitted in the symbol of steel grating), Serrated type and I-Shape type
4. Tolerance of hot dip galvanized steel grating
The allowed deviation of length is +0/-5mm, while the allowed deviation of width is +/-5 mm.
The non-perpendicularity of bearing bar is allowed no more than 10% of width of bearing bar.
Cross bar surface should not surpass bearing bar surface 1mm, beginning & end of cross bar should not surpass the end surfaces of two sides of grating 2mm.
5. steel grating application
Steel grating used in flooring, catwalk, mezzanines/decking, stair tread, fencing, ramp, dock, trench cover, drainage pit cover, maintenance platform, pedestrian/crowded pedestrian, factory, workshop, motor rooms, trolley channel, heavy loading area, boiler equipment and heavy equipment area, office buildings, apartments, train stations, department stores, hospitals,amusement parks,etc
Grating Standardizations:
Countries | National Standards for Grating | Materials | Galvanizing Standards |
China | YB/T 4001.1-2007 | GB 700-88 | GB/T13912-2002 |
America | ANSI/NAAMM(MBG531-00) | ASTM(A36) | ASTM(A123) |
Britain | BS4592-1995 | BS4360(43A ) | BS729 |
Australia | AS1657-1992 | AS3679 | AS1650 |
item | value |
Warranty | 2 years |
Material Standard | Mild steel ASTM A36, Q235, S275JR, Stainless steel 304/316, 6063Aluminum Alloy, etc |
Bearing Bar (Width x Thickness) | 25x3, 25x4, 25x5, 30x3, 30x4, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10…..100 x10mm etc; I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etc US standard: 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'', 1''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc |
Bearing Bar Pitch | 15, 20, 25, 30, 40, 60, 80mm etc. US standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. |
Twisted Cross Bar Pitch | 50, 60, 80, 100, 120mm, 2'' & 4'' etc |
Surface Treatment | Untreated(black), Hot-dipped galvanized, Powder coated, Electroplate, Painting or as per customers' requirement. |
Grating Style | Plain / Smooth, Serrated / Teeth, I bar, Serrated I bar |
Payment Term | T/T, L/C, Alibaba Trade Assurance |
Place of Origin | China |
Application | Industry,Park,Municipal Administration, etc |
Product Name | Galvanized Steel Grating |