공동주택 기계설비 공사 하자 유형분석과 실무적 관점에서의 예방 및 개선 가이드라인 제안

While MEP/FP construction scope and cost for apartments are getting increased, defect disputes between owners and constructors are also getting increased. More than often, owners’ dissatisfaction over construction defects and constructor’s reaction tends to increase filing lawsuits. This study aims to provide an analysis of residential building construction defects, in particular for mechanical and plumbing works, which are classified into nine groups and typed according to defect severity to investigate the causality. Based on the analysis, this study suggests a preventive and continuous construction quality improvement guideline for practitioners. The defect data has been collected for about 20,050 apartments units built by A construction firm from 2010 to 2017. 84.6 percent of the collected defects are found in sanitary plumbing, drain and sewage piping, hot water piping, and unit ventilator and fan installation works; the detailed defects for each work are classified and the causes are carefully investigated. Eventually the database containing case studies, causes and effects, preventive measures, and warranty measures has been developed. This database can be used as an education material for agents in charge of the quality warranty on after project delivery as well as the quality assurance right before project delivery. It is authors’ strong recommendation that the construction defect database should be built and managed at the enterprise level, the experience and knowledge of which needs to be shared by all stakeholders.