Steel grating is basically consist of Bearing bar and Cross bar by automatic press welding machine as following chart:
Steel gratings are usually made of carbon steel and stainless steel. they are generally used as industrial platform, maintenance platform, stair treads , rain-proof sunshade , fences and trench covers. widely used in the industry of Power plant, Oil Refineries,Petrochemistry, Chemical Plant, Water and Waste treatment plant, Ship-building, offshore projects and civil construction (like roads, park) ., etc.
Plain type, Serrated type, I Type and Serrated I type steel gratings are 4 basic kinds of gratings.
|Bearing bar (width * thickness)||19*2,19*3,20*2,20*3,20*5,25*3,25*4,30*5,40*5,50*5……..100*10,150*10mm|
|Bearing bar pitch (mm)||12.5, 15, 20, 25, 30, 34.3, 35.3, 40,41.25, 50, 60…(30, 40 mm are recommended )|
|Cross bar pitch (mm)||38.1, 50, 76.2, 100, 101.6 .(50, 100 mm are recommended )|
|Surface Treatment||Black/Untreated (U), Hot dip galvanizing (G), Painting (P)|
Material: Mild steel, Stainless steel
Surface treatment: Untreated, Painting or Hot DIP Galvanized.
|Country||Steel Grating standard||Galvanization Standard|
|China||YB/T4001-1998, YB/T4001-2007||GB/T 13912|
|Australia||AS1657-1992||AS/NZS 4680 , AS1650|