... serated c.4000 square meter/week Heavy duty welded steel gratingFlooring galvanized steel grating is the most widely used.We ... ,foodstuff factory,transportation,municipal administration,parking lot,etc.Characteristices:galvanized concrete serrated steel grating are anti-corrosive, resisting to ... got ISO9001 Quality Certificate.common specification: Heavy duty welded flooring galvanized steel grating