galvanized steel bridge gratings

Specifications

1.Full range in bearing bar size and mesh size
2.Largest production capability
3.Best Price
4.Reliable manufacturer
5.ISO

Hot dip galvanized steel grating standard 

 

1.Specificaiton

No.	Item	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 Bar Pitch	12.5, 15, 20, 23.85, 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	Twisted Cross Bar Pitch	38.1, 50, 60, 76, 80, 100, 101.6, 120mm, 2'' & 4'' etc
4	Material Grade	ASTM A36, A1011, A569, Q235, 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	Standard	China: YB/T 4001.1-2007,  USA: ANSI/NAAMM(MBG531-88), UK: BS4592-1987,  Australia: AS1657-1985, Japan:JIS

 

2.Applications

a.Rotation ways, channels, and platforms for pump rooms and engine rooms in various ships;

b.Flooring in various bridges such as railway bridge sidewalks, over-bridges across the street;

c.Platforms for oil extraction sites, car washing sites and air towers;

d.Fencings for car-parks, buildings and roads; drainage trench covers and drainage pit covers for highways.

 

3.Manufacturing process

Steel grating is made by the world first-class Italian ORSOGRIL 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 with firm welding, smooth surface and high strength.

 

4.Surface process of grating

Hot-dipped Galvanizing

Normally, hot-dipped galvanizing will be carried out after end welding process. When the thickness of bearing bars is not less than 5mm, the weight of average Zinc Layer will not be less than 610g/m2.

When the thickness of bearing bars is less than 5mm, the weight of average Zinc Layer will not be less than 460g/m2. The quality and requirements after hot-dipped galvanizing are according to the standards of GB/T13912