Korean Journal of Construction Engineering and Management (한국건설관리학회논문집)

Korea Institute of Construction Engineering and Management (한국건설관리학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Development of Construction Production Rates System for Estimating Proper Construction Expenses of Off-Site Construction (OSC) Based PC Structure Factory-Built Assembly

OSC기반 PC구조 공장제작 적정 공사비 산정을 위한 품셈체계 개발 연구

  • Lee, Jeongwook (Standard Construction Cost Research Institute, Hyeonin PCM) ;
  • Lee, Hansoo (Standard Construction Cost Research Institute, Hyeonin PCM) ;
  • Lee, Chiho (Standard Construction Cost Research Institute, Hyeonin PCM) ;
  • Noh, Hyunseok (Standard Construction Cost Research Institute, Hyeonin PCM)
  • 이정욱 ((주)현인피씨엠 표준건설원가연구소) ;
  • 이한수 ((주)현인피씨엠 표준건설원가연구소) ;
  • 이치호 ((주)현인피씨엠 표준건설원가연구소) ;
  • 노현석 ((주)현인피씨엠 표준건설원가연구소)
  • Received : 2022.09.02
  • Accepted : 2022.10.26
  • Published : 2022.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

The development of the Construction Production Rates System for appropriate construction cost calculation has recently come to the fore as a means of invigorating OSC based PC structure which currently needs institutional frameworks. PC structure based construction expenses consist of the factory-built assembly, transportation and on-site installation. Recently, in the field of transportation and site installation, research on product structure development is being conducted, such as presenting the standard product calculation system reflecting the results of field survey for each subsidiary materials (Lee et al., 2021). On the other hand, there is no ongoing research on estimating construction expenses of Factory-built assembly. This study suggests Construction Production Rates System which can be used for PC subsidiary materials based Factory-built assembly cost estimations. For the research, work types for the construction procedures have been categorized, and the standard input manpower suitable for the corresponding work characteristics has been derived from analyzing the associated Construction Standard Production Rates for each work type. Also, as the research referred PC subsidiary materials (such as columns, beams, walls, and slab, as well as on-site installation) and the standard number of workforce based on work types, one can calculate direct labor cost, using what the research shows. In addition, it suggests that the size of individual subsidiary materials be the extra cost factor, by using the characteristics that productivity changes depending on the size(m3) of subsidiary materials. It is expected that the research can contribute to objectively verifying factory-built assembly cost through of PC structure, which currently relies on estimates.

최근, OSC(Off-Site Construction)기반 PC구조의 활성화를 위한 제도적 기반 마련의 일환으로 적정공사비 산정에 필요한 품셈 개발을 요구받고 있다. PC공법의 공사비는 공장제작-운반-현장설치의 단계로 구성된다. 최근 운반과 현장 설치는 부재(subsidiary materials)별 현장실태 조사 결과를 반영한 표준품셈 체계(standard product calculation system)를 제시하는 등 관련 연구가 진행되고 있다(Lee et al., 2021). 반면, 공장 제작 공사비 산정과 관련된 연구는 전무한 실정이다. 본 연구에서는 PC 공법의 공장제작 공사비 산정기준 마련을 위해 공장 제작 환경에 활용할 수 있는 품셈 체계를 제시하였다. 이를 위해 시공절차에 따른 작업 공종을 도출하였으며, 공종별로 연계된 표준품셈을 분석하여 작업 특성에 적합한 표준 투입인력을 산출하였다. 품셈 체계는 PC부재의 현장설치와 동일하게 기둥, 보, 벽체, 슬래브 부재로 구성하였으며, 공종별 기능공을 기준으로 부재별 기본공수를 제시함으로서 직접노무비의 산출이 가능하도록 하였다. 또한, 개별 부재의 규격(m3)에 따라 생산성이 변화되는 특성을 고려하여 부재 크기를 품의 할증 요소로 제시하였다. 본 연구결과는 현재 견적에 의해 재료비료 계상되는 PC공법의 공장제작 비용을 객관적으로 검증할 수 토대 마련에 기여할 수 것이다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(과제번호 21ORPS-B158109-02).

References

  1. Gordian (2021). "RS Means Construction Cost Database." Gordian, America, (AUG. 08, 2022).
  2. Huh, Y.K., Kim, K.U., and Kim, K.W (2013). "Labor Productivity and Indirect Cost Rates of Steel Factory." Journal of the Architectural Institute of Korea, AIK, 29(6), pp.123-131.
  3. Kwon, S.C., Kyung, K.S., Kim, K.J., and Park, H.Y (2007). "Evaluation of Economical Efficiency of Standard Quantity per Unit by Change of Resource Quantity per Unit." Journal of the Korean Society of Civil Engineers, KSCE, 27(4D), pp. 517-524.
  4. Lee, H.S., Lee, C.H., Lee, J.W., and Noh, H.S (2021). "A study on the Composition of the Production Rates System to Prepare Standards for Calculating the Construction Cost of PC Structure Apartments Based on Off-Site Construction (OSC)." Korean Journal of Construction Engineering and Management, KICEM, 22(6), pp. 96-106. https://doi.org/10.6106/KJCEM.2021.22.6.096
  5. Lee, J.H., Pakr, M.S., Lee, H.S., Lee, K.P., and Hyun, H.S (2015). "Application of Activity-Based Costing(ABC) for Modular Building Construction Indirect Costs Calculation at the Manufacturing Stage." Korean Journal of Construction Engineering and Management, KICEM, 16(4), pp. 139-145. https://doi.org/10.6106/KJCEM.2015.16.4.139
  6. Lee, K.B., Kim, K.R., Shin, D.W., and Cha, H.S (2011). "A Proposal for Optimizing Unit Modular System Process to Improve Efficiency in Off-site Manufacture, Transportation and On-site Installation." Korean Journal of Construction Engineering and Management, KICEM, 12(6), pp. 14-21. https://doi.org/10.6106/KJCEM.2011.12.6.14
  7. Shin, W.S., and Son, C.B (2014). "Analyzing of the Construction Standard Production Unit (CSPU) and Developing of the Simulation Model on PC Project." Journal of the Architectural Institute of Korea, AIK, 30(11), pp. 89-96.
  8. Woo, Y.M., Song, J.K., Cho, K.M., Lee, H.J., Koo, K.J., Hong, T,H and Hyun, C.T (2007). "Key Influence Factors for Efficient Cost Management of Design Stages." Korean Journal of Construction Engineering and Management, KICEM, 8(2), pp. 176-184.
  9. Yun, W.G., Shin, E.Y., and Kang, T.K (2021). "Analysis of Factors for Improvement of Economic Feasibility of Construction Cost to Spread Application of OSC Construction Method for Apartment Housing." Korean Journal of Construction Engineering and Management, KICEM, 22(6), pp. 55-63. https://doi.org/10.6106/KJCEM.2021.22.6.055