1.ISO9001:2008 quality systems 2.4 running lines. 3. Delivery:7-30days 4.Availability:20,000tons/year TypeW-- welded steel grating L-- pressure-locked C-- socket-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 is usually omitted)P-paintingU- ...