... , municipal, administration, parking lot etc.3) steel grating may be applied to platform, floor, walkway, ... steel flat grates,2.I shape steel flat grates, 3. serrated steel flat grating TypeWelded steel grating, pressure-locked, socket-welding Steel ... pitch38,50,80,100mmmaterialLow carbon steel, stainless steel, aluminumSurface treatmentUntreated, hot galvanized, paintedStandardsChina: YB/T 4001 ...