... -weldingBearing bar centers15-30, 40, 60, 80, 90 mm etc. with 30, 40 mm recommended.Cross bar centersany greater than 30mm is ok ... . with 50, 100mm recommended. Surface treatmentG-hot-dip galvanization(G ... of steel grating is the most commonly used in projects with American, Australian, Japan standards are available. This kind of ...