... 3.Corss bar pitch 38-200mm Serrated galvanized grating/steel grid meshThe plain galvanized steel grating commonly used on bridge,refinery ,power plant,Sewage ... 62).Bearing bar pitches maybe12.5,15,25, 30,34,40,50,60,80mm,of which 30 and 40mm are recommended ... our production area.Grating DimensionBearing bar pitch(mm)12.5, 15,25, 30, 30.16, 32.5, 34, 40, 41.25, 45 ...