... bar pitch: 12.5, 15, 30, 40, 60mm etc, also be according to client's r Plain steel grating ... is one of the most widely used steel gratings. The bearing bar comes in ... requirement and 30, 40, 60mm are recommended3) Cross bar pitch: 38, 50, 76, 100mm, also be ... Surface treatment: Untreated, painting or hot dip galvanizing6) Steel Grating Standards:A) China: YB/T4001-1998B) USA: ANSI / ...