steel grating 1>Bearing bar pitch:30,40,60mm 2>Cross bar pitch;50,100mm 3>Plain,Serrated,I-shape steel gratingStandard Description: NoItemDescription1Bearing ... .16, 30.3, 34.3, 35, 40,41,60mm. US standard: 1"x3/16", 1 1/4"x3/16", 1 1 ... -1985The sizes and dimension is not limited to above. UsageThe steel grating is widly used on construction project, oil project, seaport, power ...