Steel grating is basically consist of Bearing bar and Cross bar by automatic press welding machine as following chart:

Product name Steel Grating Grating Style Plain type, Serrated type, I Type and Serrated I type steel gratings Surface Treatment Black/Untreated (U), Hot dip galvanizing (G), Painting (P) Usage 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. Bearing bar (width * thickness) 25*3mm,25*4mm,25*5mm,30*3mm,30*4mm,30*5mm,32*3mm,32*5mm,40*3mm,40*4mm,40*5mm,50*3mm,50*4mm,50*5mm Etc. Bearing bar pitch (mm) 12.5, 15, 20, 25, 30, 34.3, 35.3, 40,41.25, 50, 60...(30, 40,50 mm are recommended ),also can do the size as customer's request Cross bar pitch (mm) 38.1, 50, 76.2, 100, 101.6 . Etc.(30, 50, 100 ,150 mm are recommended ),also can do the size as customer's request Material: Mild steelQ235, Stainless steel