drainage grate trench cover plate metal walkway steel grating weight
Steel Grating /grate floor made by welding with flat steel and cross/round bars with certain distances. Our Steel Grating enjoy the feature of high strength, light structure, high bearing, convenience for loading and other properties. The hot dipped zinc coating gives the product excellent anti-corrosion.
Steel grating is hot dip galvanized processing, offers the following advantages: saving materials, saving investment, easy installation, durable in use, light structure, no accumulation of dirt, good performance of ventilation, lighting, heat dissipation, anti-corrosive, anti-acid an alkali corrosion.
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. >
3) Cross Bar Pitch (center to center):
38.1, 40, 50, 60, 76, 80, 90, 100, 101.6, 102, 135mm 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.
TOP SURFACE
Typically supplied with a plain surface. On our most popular products a Serrated surface (S) is also available. Please refer to the loading charts in this section of the catalogue to see which Mild Steel grating types are available with a Serrated surface.
Learn Steel Grating
Specification of Steel Grating
Steel Grating Common Size Table List:
| Cross Rod Pitch | load Bar Pitch | Steel Bar Grating load Bar Specification(Width×Thickness) |
| 20×3 | 25×3 | 32×3 | 40×3 | 20×5 | 25×5 |
| 30 | 100 | G203/30/100 | G253/30/100 | G323/30/100 | G403/30/100 | G205/30/100 | G255/30/100 |
| 50 | G203/30/50 | G253/30/50 | G323/30/50 | G403/30/50 | G205/30/50 | G255/30/50 |
| 40 | 100 | G203/40/100 | G253/40/100 | G323/40/100 | G403/40/100 | G205/40/100 | G255/40/100 |
| 50 | G203/40/50 | G253/40/50 | G323/40/50 | G403/40/50 | G205/40/50 | G255/40/50 |
| Cross Rod Pitch | load Bar Pitch | steel bar grating load Bar Specification(Width×Thickness) |
| 32×5 | 40×5 | 45×5 | 50×5 | 55×5 | 60×5 |
| 30 | 100 | G325/30/100 | G405/30/100 | G455/30/100 | G505/30/100 | G555/30/100 | G605/30/100 |
| 50 | G325/30/50 | G405/30/50 | G455/30/50 | G505/30/50 | G555/30/50 | G605/30/50 |
| 40 | 100 | G325/40/100 | G405/40/100 | G455/40/100 | G505/40/100 | G555/40/100 | G605/40/100 |
| 50 | G325/40/50 | G405/40/50 | G455/40/50 | G505/40/50 | G555/40/50 | G605/40/50 |
Recommended length table:
| Max length(mm) |
| Flat Steel section size | 25×3 | 25×5 | 32×5 | 40×5 |
| Series 1 | 550 | 900 | 1300 | 1600 |
| Series 2 | 450 | 750 | 1200 | 1500 |
| Series 3 | — | 550 | 850 | 1350 |
Process of steel grating
High strength and high bearing capacity:
- Non-slip, anti-corrosion, not easy to deform.
- High safety performance.
- Do not accumulate rain, snow and dust.
- Simple and beautiful appearance.
- Easy to install and remove to extend the lifespan.
- Applications of serrated welded steel grating
- Serrated welded steel grating is widely used as platforms, stair treads, walkaways and floors in industrial, civil and commercial buildings.
Advantage:
- No corrosion traps around joints
- High strength to weight ratio
- Allows shaping without loss of strength
- Available plain or serrated
- Allows passage of heat, light, water and ice.
The applications of steel grating:
- -Fencings for car-parks, buildings and roads; drainage trench covers and drainage pit covers for highways;
- -Flooring in various bridges such as railway bridge sidewalks, over-bridges across the street;
- -Rotation ways, channels, and platforms for pump rooms and engine rooms in various ships;
- -Platforms for oil extraction sites, car washing sites and air towers;
Steel grating standard:
| Country | Steel grating standard | Steel material standard | Hot galvanizing standard |
| China | YB/T4001-1998 | GB 700-88 | GB/T13912-2002 |
| USA | ANSI/NAAMM(MBG531-88) | ASTM (A36) | ASTM(A123) |
| England | BS4592-1987 | BS4360 ( 43A) | BS729 |
| Australia | AS1657-1992 | AS3679 | AS1650 |
Type of Steel Grating
Comparison of Feature:
| 
Plain:One of the most widely used grating, available for flooring, sidewalk, dranage pit cover, stair tread, etc.
| 
Serrated:Better non-skid property & safety comparing to plain grating
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I-shape:Lighter, more economical and practical comparing to plain grating.
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Process of steel grating:
Manufacturing Tolerance of the Gratings
There is no maximum allowable tolerance for every dimension given here.
Product Tags:
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