Steel grating is also called steel frame lattice or steel grid plate:It is usually made of Q235 (low carbon steel) stainless steel. It is a kind of steel product that has square lattice made by welding flat steel and bar that are crossed and arranged in certain space. It is mainly used as drain cover, steel structure platform board, ladder tread, etc. The bar is usually twisted square steel (twisted steel).
The surface treatment can be hot galvanizing, cold galvanizing (electric galvanizing), paint spraying, antirust oil soaking, dipping, plastic spraying, and no treatment.
Steel grating production standard:
| Steel grating standard | Steel standard | Hot dipping zinc standard |
| China YB/T4001.1-2007 (lateststandard) | China GB700-88 | China GB/T13912-92 |
| US ANSI/NAAMM (MBG531-93) | US ASTM(A36) | US ASTM(A123) |
| British BS4592-1:1995 | British BS360(43A) | British BS729 |
| Australian AS1657-1992 | Australian AS3679 | Australian AS1650 |
Cross Rod Pitch:
A 100 mm (center distance)
B 50 mm (center distance)
C 25 mm (center distance)
Cross Rod Size:
Generally 6 x 6 twisted rod
5 x 5 twisted rod for small size grating
5round bar for stainless grating
Load Bar Size:
Usually 20 x 3 mm ~ 90 x 7 mm
Load Bar Pitch:
Series 1 30 mm (center distance)
Series 2 40 mm (center distance)
Series 3 40 mm (center distance)
Load Bar Top Surface:
P refers to common plain type (as default, see figure 1 below)
S refers to reinforced anti-skid serrated type (see figure 2 below
I refers to load bar with I- shape section
Surface Treatment:
G refers to hot- dip galvanizing;
P refers to dip painting;
U refers to no surface treatment (as default)
E refers to electrochemical polishing
features:
1. High strength, light structure: solid grid pressure welding structure has advantages of high load, light structure, easy installation, etc.
2. Fine appearance, durable in use: hot zinc dipping surface treatment makes it own fairly good corrosion resistance, bright and beautiful surface.
3. Good ventilation, lighting, thermal, anti-explosion, and anti-skid performance.
4. Prevent dirt deposition.
| Series | Flat steel space | Bar space | Load flat steel specification (width * thickness) |
| 20×3 | 25×3 | 32×3 | 40×3 | 20×5 | 25×5 |
| 1 | 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 |
| 2 | 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 |
| 3 | 60 | 50 | G203/60/50 | G253/60/50 | G253/60/50 | G403/60/50 | G205/60/50 | G255/60/50 |
| Series | Flat steel space | Bar space | Load flat steel specification (width * thickness) |
| 32×5 | 40×5 | 45×5 | 50×5 | 55×5 | 60×5 |
| 1 | 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 |
| 2 | 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 |
| 3 | 60 | 50 | G325/60/50 | G405/60/50 | G455/60/50 | G505/60/50 | G555/60/50 | G605/60/50 |
Category of Steel Gratings:
Divided by welding method: Pressure welding type, inlaid type, lock penetration type and
weld penetration type.
Divided by the shape of load flat steel side: Flat type, tooth type, and I shape, etc.
Divided by material: Stainless steel grating and carbon steel grating
Production Process:
Application:
It is widely used for platform, aisle, trestle, drain cover, manhole cover, steel
ladder, fence, and guardrail in the fields including petrochemical, power station, sewage
treatment plant, mechanical manufacture, mechanical and electrical equipment, paper mill, cement plant, pharmacy, food processing, municipal engineering, environmental engineering, etc .
