In South Korea, over 400,000 Non-building Structures are inadequately managed and exposed to potential risks due to insufficient inspection systems, leading to an increase in accidents and significant losses of life and property. Therefore, it is crucial for users to conduct proactive self-inspections to identify and mitigate potential hazards. This study reclassified Non-building Structures into four main categories by analyzing their structural characteristics and associated risks through statistical analysis. Among these, retaining walls, which account for the largest proportion, were systematically analyzed to identify common damage patterns. Based on this analysis, self-inspection checklists were developed for both non-experts and experts. The proposed process involves an initial visual inspection using a simple non-expert checklist, followed by a more detailed expert-level inspection if any anomalies are detected. The reliability of this process was validated through approximately 120 validation processes.

Presently, the wind power tower grows actively in all countries of the world as the part of renewable energy securing. Recently, as to the wind power tower, the advance to and diversification of the wind power tower form and material are made. but the maintenance manual about the wind power tower in which this foundation is based is insufficient. therefore, the object is that in being safe and maintaining efficiently the wind power tower, by developing the maintenance manual about the fundamental vulnerable element the life span improvement of the wind power tower is planned and it contributes to the maintenance management technology development.

The maintenance of the general structures has been studied until today. but maintenance guide line of the wind power tower has not been studied yet. In this study it was performed analysis on structural features through wind power tower technique data survey. which can be developed to basic data for the wind power tower maintenance manual through analysis of vulnerable elements.

Retaining wall maintenance manual were modified and supplemented to reflect the revised standards and guidelines. This manual was revised to be easy to use by field engineers.