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Painted Or Galvanized Heavy Duty Steel Grating , 555 / 40 /100 For Trench Cover
Heavy Duty Steel Grating Description:
Steel bar grating
1. The shape of bearing bar: Plain type (may be omitted in the symbol of steel grating), Serrated type and I-Shape type
2. Bearing bar pitches can be 12.5, 15, 20, 30, 30.16, 32.5, 34.3, 40, 60mm, of which 30mm & 40mmare recommended.
3. Cross bar pitches can be 38, 50, 60,100mm, of which 50mm & 100mm are recommended.
4. Surface treatment: Hot-dip galvanizing, paint or other anti-corrosive coatings are available, of which hot-dip galvanizing is generally recommended.
5. Material: Q235 in line with GB/T700 steel
Heavy Duty Steel Grating Tolerance:
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 2mmMachine Welding Heavy Duty Metal Grate Stair Treads For General Industries
Heavy Duty Steel Grating Features:
Aesthetic outlook: Simple lines and silver appearance meeting the modern trend.
The best drainage: Leakage area of 83.3 percent, more than twice of cast iron products.
Hot-DIP galvanized treatment: Good rust-proof property, maintenance-free replacement.
Anti-theft design: The cover and the frame is joint with hinge offering security, safety and open convenience.
Savings investments: Large-span. Less lost for heavy load compared with cast iron products. Cost can be saved for the risk of being stolen or crushing one if cast iron is uses.
High strength: The strength and the toughness are much higher than cast iron. Can be used for terminals, airport and other large-span and heavy loading condition.
Specifications: More specifications and sizes optional for meeting various environment, load, span, sizes and shapes.
Heavy Duty Steel Grating Specification:
| No. | Item | Detailed Description |
| 1 | Bearing Bar | 25x3, 25x4, 25x4.5, 25x5, 30x3, 30x4, 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm 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 | ||
| 2 | Bearing Pitch | 12.5, 15, 20, 25, 30, 30.16, 30.3, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm etc |
| US standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc | ||
| 3 | Cross Bar Pitch | 38.1, 40 50, 60, 76, 80, 100, 101.6, 120mm, 2' ' & 4' ' etc |
| 4 | Steel Grade | ASTM A36, A1011, A569, Q235, S235JR, S275JR, SS304, Mild steel & Low carbon steel, etc |
| 5 | Surface Treatment | Black, self colour, hot dip galvanized, painted, spray coating |
| 6 | Grating Style | Plain / Smooth, Serrated /teeth, I bar, serrated I bar |
| 7 | Grating Standard | China: YB/T 4001.1-2007, USA: ANSI/NAAMM(MBG531-88), |
| UK: BS4592-1987, Australia: AS1657-1985, Japan: JIS |
Heavy Duty Steel Grating Picture:
