• Title/Summary/Keyword: 표준품셈

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Comparison of Labor Inputs from Standard Quantities per Unit and Actual Quantities in Apartment Reinforced Concrete Work (공동주택 골조공사의 표준품셈 노무량과 실투입 노무량 비교)

  • Jeon, Sang-Hoon;Koo, Kyo-Jin
    • Korean Journal of Construction Engineering and Management
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    • v.9 no.2
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    • pp.182-189
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    • 2008
  • In private and public construction works, cost estimation and site productivity management are based on designed labor quantities calculated by the Standard Quantities per Unit (SQU). The designed labor quantities are regarded as the basis for insurance costs and safety and environmental costs and also affect the progress measurement of construction works. Even though the designed labor quantities from the SQU has been considered to be different from actual labor quantities put to construction works, there is no research that empirically analyzes the statistical differences. This study analyzes actual labor quantities of form workers, steel-bar fabricators, concrete pourers in reinforced concrete works of the 43 apartment projects, and compares the actual labor quantities to labor quantities from the SQU. It goes further to scrutinize the critical reasons underlying the differences through a survey on 65 practitioners and interviews with 32 site managers and supervisors. The regression models of labor quantities of the apartment concrete work produced by the present study will contribute to reasonable construction contracts based on the past actual costs and practical site management by the actual labor quantities.

An analysis of excavation cycle time for Korean tunnels and the comparison with the Standard of Construction Estimate (국내터널 굴착 사이클타임에 대한 분석결과와 표준품셈과의 비교)

  • Kim, Yangkyun;Kim, Hyung-Mok;Lee, Sean S.
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.21 no.1
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    • pp.137-153
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    • 2019
  • Estimating tunnel construction time and costs are the most fundamental part of a tunnel project planning, which has been generally assessed on a deterministic basis until now. In this paper, excavation cycle time was investigated for two road tunnels and one subway tunnel, and the results were compared with the Standard of Construction Estimate (SE), which is made for the estimation of construction time and cost in a design stage. The results show that the difference in cycle time between SE and actual cycle time is 50%, 7% and 31% respectively for the three tunnels, which means that SE does not reflect practical operation time. The major reasons of the difference are skilled level of tunneling workers, the change of operation sequences for more effective operations, much more complicated working atmosphere in a tunnel than the assumption of SE etc. Finally, even though the results can not be generalized since investigated tunnels are only 3, but it is thought that SE needs to be upgraded into the model able to consider quite common situations through additional tunnel investigation and studies in the future.

Estimation of Construction Equipment Expenses - Bulldozer and Loader - (표준품셈의 기계경비 산정 현실화를 위한 자료 조사.분석 -불도우저와 로우더를 중심으로-)

  • Huh, Young-Ki;Kim, Kyung-A;Ahn, Bang-Ryul;Tae, Yong-Ho;Park, Hee-Sung;Kim, Chang-Wan
    • Korean Journal of Construction Engineering and Management
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    • v.9 no.1
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    • pp.155-166
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    • 2008
  • The Equipment Expenses section of the Poom-Saem that is used for Construction Cost Estimation of public sectors in Korea has been rarely revised, and so does not reflect changes of Construction Equipment technology and construction methods, since it was established based on data from Japan and the U.S in the early 1960s. In order to make reasonable estimation of equipment expenses for a bulldozer and a loader, the domestic and overseas documentary records were investigated. Further, 16 construction sites were visited, and 20 Construction Equipment leasing services were surveyed. The optimum level of each item which consists of equipment costs was revealed based on the result of the analysis on the figures of equipment costs calculation from the Poom-Saem and the collected data. The research will be the foundation for applying the rapid development of Construction Equipment and technology to the appropriate cost estimations and the ground work of related studies.

Analysis and Realistic Estimation of Maintenance Cost of Construction Equipment Expenses (건설기계 경비의 관리비 구성 분석 및 현실화)

  • Kim, Kyung-A;Huh, Young-Ki
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2007.11a
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    • pp.503-508
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    • 2007
  • The Equipment Expenses section of the Poom-Saem, that is used for Construction Cost Estimation on public sectors in Korea, has been rarely revised, and so does not reflect changes of construction equipment technology and construction methods, since it was established based on data from Japan and the U.S in the early 1960s. In order to make reasonable estimation of maintenance costs(Interest, Storage, Insurance, Tax), the equipment expenses section of the Poom-Saem and the domestic and overseas documentary records were investigated. Further, 16 construction sites were visited, and 20 Construction Equipment leasing services were surveyed. Based on results from analysing figures related with the estimation of maintenance costs, the maintenance cost is redefined. Then, construction equipment was classified into 6 exclusive construction equipment and general one, and realistic figures of the maintenance cost, which consists of interest, storage, insurance, tax, are suggested respectively. The optimum level of each item which consists of equipment costs was revealed based on the result of the analysis on the figures of equipment costs calculation from the Poom-Saem and the collected data. The research will be the foundation that helps to estimate appropriate construction costs and the ground work of related studies.

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Estimating Standards and Cost Data for Modernized Korean Hosing (Hanok) (신한옥 건설 특성을 반영한 표준품셈 개발)

  • Kim, Suji;Kim, Min;Lee, Yunsub;Jung, Youngsoo
    • Korean Journal of Construction Engineering and Management
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    • v.17 no.1
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    • pp.66-75
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    • 2016
  • As the demands for traditional Korean housing has been increased in recent years, modernized Korean traditional housing (Hanok) was developed as a way of providing Hanok for the public. Modernized Hanok attempts to remedy the shortcomings of the traditional hanok (i.e., high unit cost of building and low energy performance). In the previous researches, standardization and productivity improvement for modernized Hanok dissemination have been intensely developed. Above all, cost estimating for modernized Hanok is also an important factor. In an effort to provide effective system for Hanok construction, this paper developed 'standard cost data' for modernized Hanok. Distinct characteristic of modernized Hanok construction were analyzed first. Then, basic structure was identified, and major items were selected for Hanok standard cost data. However, this set of cost data was developed based on two mock-up Hanok projects actually constructed. Accordingly, this standard cost data will be further updated and modified by continuously accumulating real-world Hanok projects

2006년도 적용 건설공사 기계설비부문 표준품셈 개정내용

  • Korea Mechanical Construction Contractors Association
    • 월간 기계설비
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    • no.1 s.186
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    • pp.54-55
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    • 2006
  • 한국건설기술연구원은 지난 해 12월 30일 2006년 1월 1일부터 적용되는 46개 항목의 건설공사 표준품셈을 관계기관 실무자로 구성된‘품셈 위원회’의 심의를 거쳐 최종 확정, 공표했다. 건기연은 신기술의 적용성을 높이기 위해 실제 사용되는 공법을 중심으로 기계설비부문에서는 발열선등 5개의 품셈이 신설되었고, 기존 품셈의 조문정리 등 체계보완이나 적정성 조정을 위해 재료 할증률등 4개 항목을 보완했다. 기계설비부문의 발열선 품은 배관 동파방지를 이해 가구내 급수 급탕 계량기 주위, 가스보일러 하부배관 및 옥외지하주차장 배관 등에 발열선을 설치하고 있으나 적정품이 없어 전기표준품셈의 Heat Tracing System을 준용하고 있어 가구내와 공용부위로 구분해 신설한 품이다. 건기연은 품셈개정을 위해 지난해 3월 각 발주기관과 관련단체의 의견을 수렴해 대상항목을 선정한 데 이어 지난해 10월까지 건설현장에 대한 실사를 통해 수집한 자료를 토대로 품셈을 신설∙보완했다고 밝혔다.

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Study on Improvement of Cost Calculation Method in Construction less than One Day Workload (1일 작업량 미만 공사의 공사비 산정 방식의 개선방안에 관한 연구)

  • Shin, Dae-Woong;Lee, Young-Do;Shin, Yoonseok;Kim, Gwang-Hee;Yoo, Sangrok;Park, Wonjun
    • Journal of the Korea Institute of Building Construction
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    • v.14 no.5
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    • pp.477-485
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    • 2014
  • Standard production unit system and historical cost data are the most typical data base for calculating budget price in construction. However, these construction cost estimation methods are difficult to calculate proper construction cost because definition, additional allowance or modification criteria is not clear in construction within one day. Therefore, this study identifies problems for standard production unit system and historical cost data and suggests the improvements for them. For the objectives, this study analyzes frequency after implementing survey for 44 specialty contractors in placing at kyeonggi-province. As the results of the study, labor costs in standard production unit system and equipment costs in historical cost data and in construction of pavement and maintenance by project type was exceeded at most high rate against construction cost estimation methods. Based on this result, standard production unit system and historical cost data need to be modified by three improvements such as classification by project scale. These will be baseline data for improvement of construction cost estimation methods for less than one day workload.

A Study on the Work Crew Based for the Estimation from Construction Analysis of Cement Liquid Waterproofing in Apartment House (공동주택 시멘트 액체방수 공사의 현장분석을 통한 작업조 기반 품셈에 관한 연구)

  • Ha, Gee-Joo;Ha, Min-Su
    • Journal of the Korea Institute of Building Construction
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    • v.10 no.3
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    • pp.121-128
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    • 2010
  • This study aims to make improvements to the standard estimation process used to estimate reasonable costs for construction work, and to suggest a work crew based estimation using a new cost estimation model. In addition, work crew shift combination and construction process were systematically organized in order to improve the estimation technique and the construction capability of the cement liquid waterproofing work for apartment buildings. In addition, in terms of manpower and productivity, analyses were performed on the cement liquid waterproofing work for apartment buildings with net areas between $84-85m^2$ and $125-184m^2$, and the results were then compared with those calculated using the conventional work-crew based estimation method. Through this study, when the results of this study and those calculated by the conventional method were compared, for apartments with the net area of $84-85m^2$, the differences between specialists were shown to be 1.91 times to 2.13 times on average, while they were 8.82 times to 9.52 times between normal workers on average. For apartments with the net area of $125-184m^2$, the differences betweenspecialists were shownto be 1.89 times to 2.07 times on average, and 8.57 times to 9.38 times on average between normal workers.