... serrated 3.finish:black painted,mill,galvanized hot dipped galvanized steel grating 1.Material: SS302,SS304,SS316,SS310,SS314,SS201 ... ,SS430,SS321 2.Type: W--welded steel grating L-- pressure-locked C-- socket-welding 3.Bearing ... ) Austrilia: AS1657-19927.Fields of Application:Platforms ,sidwalks,filter grates, ventilation grates,driling stages, ladder steps,ditch ladder steps,ditch ...