Title A Study on Development of Construction Standard Production Rates and Cost Analysis for Off-Site Construction (OSC)-Based PC Structure Construction Costs - Comparison with RC Method -
Authors Lee, Hanso ; Lee, Chiho ; Han, Heesu ; Lee, Jeongwook
DOI https://dx.doi.org/10.6106/KJCEM.2024.25.2.056
Page pp.56-68
ISSN 2005-6095
Keywords OSC (Off Site Construction); Construction Standard Production Rates; Precast Concrete; Construction cost
Abstract A construction standard production rates system for the factory built and on-site installation phases of OSC (Off-Site Construction)-based precast concrete (PC) structures in apartment buildings was recently proposed to establish an objective cost standard (Lee et al., 2021). In addition, the Korean government has taken steps to improve the institutional foundation for the systematic calculation of PC construction costs such as revising construction standard production rates for major components that can be applied to the on-site installation phase of PC method. In this study, we analyzed the results of a field survey of apartment building PC structures and collected expert opinions to develop factory-built and on-site installation standard production rates that can be applied to apartment building PC method. We also propose directions for improving the standard production rates so that they can be applied to the site and component of apartment buildings by comparing them with the current standard production rates. This study also derived the cost characteristics and cost reduction measures of PC construction by calculating the construction costs using the developed rates and comparing the construction costs with the RC methods of apartment buildings of the same scale. The construction standard production rates for PC construction derived in this study are expected to contribute to the spread of PC construction by ensuring the objectivity and consistency of the results of PC methods cost estimation.