... checkered plate. After hot dip galvanized, the compound steel grating plate will warp and distort because ... to smooth; please note the shaping. The compound steel grating plate commonly takes series 3 steel grating ... grating of certain load-bearing and checkered plates. Compound steel gratings may deform going through the hot ... 20*3 to 100*6 2) Bearing bar pitch: 12.5, 15, 25, 30, 40, 60mm etc. ...