steel grating serrated,plain,I bar Plain,Serrated,I-BAR ISO9001 & GRATING SPECIALIST 1) Light weight, great load-bearing capacity, non-slip and safe, easy ... ,40,50mmCross bar pitch38,50,80,100mmmaterialLow carbon steel, stainless steel, aluminumSurface treatmentUntreated, hot galvanized, paintedStandardsChina: YB/T 4001.1-2007USA: ANSI/NAAMM ...