• Title/Summary/Keyword: Prefabrication

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Analysis of Technical Requirement for Implementation of Multi-trade Prefabrication (Multi-trade Prefabrication 기법 적용을 위한 기술적 요구사항 분석)

  • Jang, Se-Jun;Lee, Ghang
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.05a
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    • pp.113-114
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    • 2016
  • This paper proposes a technical requirements analysis of implementation of multi-trade prefabrication. Recently, there has been a rise in the use of prefabrication to minimize on-site work for time reduction to increase productivity. Prefabrication technique is evolved into multi-trade prefabrication combining other trades from single-trade prefabrication. For implementation of new technique, not only itself but complementary techniques have to be prepared. In this paper, MEP corridor rack, a major item of multi-trade prefabrication, was implemented in the test bed and its process was analyzed to find out technical requirements. As a result, comparatively high level of IT technique was required for efficient use of multi-trade prefabrication in design, lifting and construction phase. In design phase, component level of BIM library was needed for manufacturing; and in lifting phase, BIM-based site logistics process was required. Also in construction phase, laser scanning was implemented for gathering shape and geometry of the wall and slab that were attached to multi-trade prefabrication module.

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Deriving Critical Management Factors based on Case Studies of Multi-trade MEP Ceiling Rack Prefabrication (복합공종 MEP 천정 선조립 공법 사례조사를 통한 단계별 중점관리사항 도출)

  • Lee, Dongmin;Jang, Sejun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.11a
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    • pp.76-77
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    • 2015
  • In construction industry, management of construction factors such as cost, schedule, quality and safety is the most important key for delivering successful projects. According to the Smart Market Report, a magazine specialized in construction industry, recently said 'Off-site Prefabrication' is a significant trend related with construction productivity in global construction industry. It is a kind of practice shift from On-site to Off-site. A lot of general contractors in oversea have been using 'Multi-trade MEP Ceiling Rack Prefabrication' method for getting benefits such as decreased cost & schedule and increased labor productivity. Thus, in this paper, critical management factors at each phase from design to installation was derived by researching case studies. Forwardly, it can be a basic guideline for applying Multi-trade MEP Ceiling Rack Prefabrication in Korea construction industry.

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The Comparison of Work Time between Field Fabrication Method and Partial Prefabrication Method of Rebar work (벽체철근 일반조립과 부분 선조립 공법의 작업시간 비교에 관한 연구)

  • Kim, Young-Kil;Kim, Gwang-Hee
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.11a
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    • pp.12-13
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    • 2018
  • Reinforced concrete works account for 40 to 50 percent of the total construction work. However, the shortage of construction workers is a problem in the delay of the construction period of reinforced concrete. The partial rebar prefabrication is one of the ways to shorten construction period. Thus, this study compared the partial rebar prefabrication and field fabrication method through work sampling. As a result, the partial rebar prefabrication showed a significant decrease in time compared to field fabrication method. As a result of this study, it is expected to be used as a reference for the efficient selection of reinforced concrete methods.

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A Study on Unit Modular Design Method of Urban-type Housing (도시형 생활주택의 유닛 모듈라 공법 설계에 관한 연구)

  • Lee, Ga-Kyung;Lim, Seok-Ho
    • Journal of the Korean housing association
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    • v.22 no.5
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    • pp.101-110
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    • 2011
  • The Ministry of Land, Transport and Maritime Affairs has announced a policy which can enable the building of urban type housing with the use of a prefabrication method 2010. However, such may possibly be at standstill owing to the prefabrication methodology that has not been currently developed in Korea. Moreover, small households of consisting of one or two family members have been steadily increasing, but the small housing units in which they reside has been decreasing. Due to this situation, urban type housing has been proposed. To expand the propagation of such urban type housing and to promote prefabrication methods, the top priority project is to develop a technology that is able to reduce construction costs, as well as to shorten the actual construction period. In consideration of this prefabrication system for an avenue to solve such problems, a series of systems and policies for the fostering of prefabricated urban type housing has been proposed. This study is to review a series of methods, technologies and policies that are required for such urban type housing and henceforth, to utilize such as preliminary data for further prefabricated urban type housing.

A Study on Unit Modular Design Method of Urban-type Housing (도시형 생활주택의 유닛 모듈라 공법 설계에 관한 연구)

  • Lee, Ga-Kyung;Lim, Seok-Ho
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2011.04a
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    • pp.75-80
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    • 2011
  • The Ministry of Land, Transport and Maritime Affairs has announced a policy which could enable the building of urban type housing using a prefabrication method in 2010. However, it may possibly be at standstill owing to the prefabrication methodology has not been currently developed in Korea. Moreover, small households of one or two family members are been steadily increasing, but small housing in which they reside has been decreasing. Because of this situation, the urban type housing has been proposed. To expand the propagation of this urban type house and to promote the prefabrication method, the first-priority project is to develop a technology that is able to reduce the construction costs, as well as to shorten the construction period. Considering this prefabrication system as an avenue to be able to solve these problems, a series of systems and policies for fostering prefabricated urban type housing has been proposed. This study is to review a series of methods, technologies and policies that are required for urban type housing and henceforth, to utilize them as preliminary data for prefabricated urban type housing.

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Model-based Construction Policy Making: Singapore Government's Strategies for the Diffusion of Prefabrication

  • Park, Moonseo
    • Proceedings of the Korean System Dynamics Society
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    • 2002.11a
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    • pp.103-122
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    • 2002
  • Construct ion sector government policies are targeted towards regulation than facilitation and management. This approach often fails to integrate different segments of the public and private and seems to be inadequate in encouraging the private sector to achieve better quality construction. This situation suggests a need for a better and systematic approach for construct ion policy making. This paper suggests a model-based approach to public policy making using system dynamics approach. Singapore government's policy making efforts to encourage the use of prefabrication are discussed as an application example. This paper presents system models which discuss strengths and weaknesses of the current construction system in Singapore using casual loops, and highlights the feedback processes that would be useful in decision making for the government. Based on these system dynamics models, this paper identifies four major potential policy interventions policy interventions.

Work Time Analysis of Rebar Fabrication Method in Beam Construction. (보 철근공사 조립공법별 작업시간분석)

  • Kim, Ju-Yong;Kim, Min-Ku;Kim, Young-Kil;Kim, Gwang-Hee
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.11a
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    • pp.8-9
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    • 2019
  • The rebar work is a labor intensive construction work with a high labor cost ratio. It is difficult to manage the productivity, construction time, and safety of rebar work. The problem of productivity decreased in rebar construction is due to a lack of workers according to the aged workers. Partial prefabrication rebar can be an alternative solution to productivity decreased in rebar work. The characteristic of partial prefabrication method is that time consuming component such as stirrup of beam assemble in factory and others assemble in site. Therefore, in this study, the time required for each rebar assembly method is measured and analyzed to confirm the possibility of productivity improvement.

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Strategy for Facilitating Old Aged Apartment Remodeling through Technology Analysis for Space Expansion (노후공동주택 리모델링시의 평면확장 적용공법 분석을 통한 활성화 방안 수립)

  • Lee, Dong-Gun;Cha, Hee-Sung;Kim, Wan-Hyuk;Shin, Dong-Woo
    • Korean Journal of Construction Engineering and Management
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    • v.9 no.6
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    • pp.147-155
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    • 2008
  • In the 1970s, increasing penetration of the housing co-housing policy, reconstruction be a great success to improve 1990‘s Old aged apartment's performance. However, in case of reconstruction, it causes the problem such as city environment destruction, resource waste, real-estate speculation etc. With the trend of sustainable construction and resource recycling, remodeling gets more attention than before. In case of country's remodeling, conventional method causes some problems such as delayed construction period and increased cost. Therefore, efforts that obtain economical efficiency are required to power remodeling through use of prefabrication method like PC technology that is useful for reduction effect of construction period, cost and site labor and excellent quality. This research indicates reduceing factor for facilitating prefabrication method and technology selecting framework through specific of Expanding Floor method and remodeling cases to increase the efficiency of remodeling, considers construction parties approaching plan for prefabrication as occasion that powers remodeling.

CONCEPTUAL MODEL OF RFID APPLICATION IN PREFABRICATION INSTALLATION PROCESS

  • V. Peansupap;T. Tongthong;B. Hasiholan
    • International conference on construction engineering and project management
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    • 2007.03a
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    • pp.279-288
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    • 2007
  • Attempts to achieve a higher productivity have led studies to focus on process improvement. Information has been found as an essential element for process improvement. This research has introduced and focused on two types of information, namely: related jobsite information along the process and feedback information. Related jobsite information along the process which needs to be processed and delivered in a timely manner, accurate, and real time is required to streamline the decision making process. Whereas feedback information about process' current practices which have to be captured and stored is a useful for continuous improvement in identifying the problem origin and determining corrective action. In the current practices, although these two types of information are essential for process improvement, construction process has faced barriers in obtaining that information. Therefore, this research will propose a new information system to overcome the aforementioned barriers. The new information system consists of RFID as an automatic identification and data collection device integrated with database to support construction processes. The new system attempts to provide related jobsite information along the process and feedback information to support decision making process and continuous process improvement respectively. A case study of prefabrication installation process in housing projects has been selected to be implemented in conceptual model of RFID application in construction industry. Conceptual model will be presented in this paper as an initial stage of this ongoing research. Expected outcomes of the new system and future works will be discussed briefly.

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