marine aluminium accommodation ladder 1.materil:aluminium LF5 2.Surface oxidation treatment 3.supply CCS,ABS,DNV,GL.... marine aluminium accommodation ladder desighed and manufacture according to ISO5488-79 and GB/T14360-93Aluminium construction ,light and hight strengthARC stept with antiskid groove Surface oxidation treatmentsupply CCS,LR,GL,BV,NK.....certificate stepsL(mm)L1(mm)L2(mm)L3(mm)Max ...