... days 3.Packing : 300tons per month hengzhou's steel grating can be used for ladder steps ,fences ,clips ,platforms gratings .flooring gratings ... of Application Platforms ,sidwalks,filter grates,ventilation grates,driling stages, ladder steps,ditch grates,fences,framedgrates,trash rack grates ,paint backing ... 101.6mm of which 50mm and 100mm are recomended . safety steel step ladders with handrail