... ,Sewage treatment plant and so on.Bearing bar pitches maybe 12.5,15,25, 30,40,50,60,80mm,of which ... , serratted and I bars.Grating Dimension Bearing bar pitch(mm)12.5, 15,25, 30, 30.16, 32.5, 34, 40 ... grates,fences,framedgrates,trash rack grates ,paint backing chambers…… grating fence&metal fence