... pitch:30-90mm cross bar pitch:50-100mm 2# to 23# hot dipped galvanized steel grating(factory)Hole shapes: Long holes ... round holes, triangle hole, diamond holes, etc.Surface treatment: Hot-dipped-galvanized ,electro galvanized or PVC coated,PVC painted,etc ... bar pitch38,50,76,100,101.6mm4MaterialQ235,A36,SS3045Surface treatmentBlack, hot dipped galvanising, paint6StandardChina: YB/T 4001.1-2007USA: ANSI ...