... , machinery industry, shipbuilding, harbor, oceanographic engineering, building, paper mills, cement plant, medicine, spinning and weaving, foodstuff factory, transportation, municipal, administration, parking ... ,30,35,40,50mmCross bar pitch38,50,80,100mmmaterialLow carbon steel, stainless steel, aluminumSurface treatmentUntreated, hot galvanized, paintedStandardsChina: YB/T 4001.1 ...