In　existing　probabilistic　durability　design　for　marine　reinforced　concrete　(RC)　structures,　the　material-level　deterioration　behavior　is　modelled,　and　corrosion　onset　at　a　point　on　the　rebar　is　taken　as　the　limit　state.　However,　the　owners　may　more　concern　the　risk　of　the　structural　member＇s　surface　damage　or　the　potential　maintenance　demands.　To　bridge　the　gap,　a　member-level　durability　design　method　is　developed　in　this　paper.　It　treats　the　target　reliability　index　as　a　function　of　member-level　target　performance,　and　incorporates　the　existing　design　method　into　the　proposed　framework.　Its　differences　and　relations　with　the　existing　material-level　method　are　addressed.　By　improving　the　effective　tools　from　existing　studies,　the　general　procedures　of　performing　a　member-level　durability　design　are　proposed.　Taking　the　HZM　project　as　the　examples,　member-level　durability　designs　are　performed　for　its　beams,　columns　and　immerged　tube　tunnels　under　various　exposure　conditions　with　various　design　targets　being　considered.　Accuracy　of　the　design　outputs　are　checked　by　assessing　the　corresponding　member-level　performance　and　comparing　it　to　the　design　targets.　In　addition,　the　proposed　method　is　also　validated　with　the　in-situ　data　from　an　in-service　high-pile　RC　wharf.　©　2024　Elsevier　Ltd