Hot dip Galvanized Steel Grating 1.Bearing bar pitch:30,40,60mm ... .Plain,Serrated,I-shape 4ISO9001 Hot dip Galvanized Steel Gratinggalvanized steel grating is the most widely used.We have 7 ... , commonly used for platforms, trenchgratings, and stair treads.Standard Description: NoItemDescription1Bearing bar25x3,25x4,30x3,30x4,30x5,32x5,40x5 ... .3, 34.3, 35, 40,41,60mm. US standard: 1"x3/16", 1 1/4"x3/16", 1 ...