건설현장의 근로자 편의시설 설치실태 분석 및 개선방안

손창백,Son, Chang-Baek 대한건축학회 2012 대한건축학회논문집 Vol.28 No.4

As blue-collar construction workers are the critical source among production factors of the labor-intensive construction industry in Korea, the improvement of the labor environment including employment stability, realistic remuneration are emergently required. In view of this, the study, based on the associated primary data, attempts to analyze installation condition in construction sites and installation criteria in a large-sized construction company on the convenience facilities for construction site workers, and to investigate satisfaction level of the blue-collar construction workers on that ones. The study further suggests some realistic informations upon which the efficient improvement measures for the blue-collar construction workers possibly are prepared. The results of this study are provide practical basic data for establishment of realistic as well as reasonable policies/programs for the working milieu improvement.

[초청논문] Track I : 최근 CM 사례

손창백,하한기,Son, Chang-Baek,Ha, Han-Gi 한국건설관리학회 2008 한국건설관리학회 논문집 Vol.9 No.6

경년별 총비용을 고려한 공동주택의 리모델링 시기 추정에 관한 연구

손창백,오치돈,Son Chang-Baek,Oh Chi-Don 한국건설관리학회 2005 건설관리 : 한국건설관리학회 학회지 Vol.6 No.2

Although the life-spans of most apartment buildings are over fifty years, they are often demolished and retrofitted only after twenty years, in spite of its remaining life expectancy, resulting in economical waste. The purpose of this paper is to estimate optimum remodeling period of apartment buildings using total cost. In this study it is seen that total sum of running cost of life-span on the buildings is about 4.69 times of initial cost till the fifty years of the life expectancy. The optimum remodeling period of the apartment building is thirty years applying the discount rate of $4.17\%$ and the discount rate should be $6.122\%$ to obtain the forty years of the optimum remodeling period. From the sensitivity analysis based on the change of the discount rates, it is seen that if discount rate decreases the optimum remodeling period can be extended, or vice versa. As a result, a time of the demolished and remodeling can be expected and the basic data can also be established for lengthening life-span of the apartment buildings. 일반적으로 공동주택의 수명은 50년이지만, 보통 20년이 경과하면 철거되거나 재건축되어 경제적인 낭비를 초래하고 있다. 이에 본 연구는 LCC이론을 기초로 초기투자비와 경과년수에 따른 유지관리비용의 합이 최소가 되는 시점을 추정 $\cdot$ 분석하여 공동주택의 적정 리모델링 시기를 도출함을 목적으로 하였다. 본 연구의 결과를 보면 내용년수 50년까지의 건축물의 생애 총유지관리비용의 합은 초기투자비의약 4.69배가 되고, 공동주택의 적정 리모델링 시기는 할인율 $4.17\%$를 적용했을 경우 30년으로 파악되었으며 서울시에서 발표한 법정허용년수인 40년이 경제수명으로 설정되려면 할인율은 $6.122\%$가 설정되어야 한다. 또한 할인율 변동에 따른 민감도 분석결과 할인율이 감소할 경우 적정 리모델링 시기는 연장되며, 증가할 경우 단축되는 것으로 나타났다. 이에 본 연구의 결과는 공동주택의 철거 또는 재건축 시기를 예측할 수 있으며, 보수 및 대수선의 적절한 시기를 예측하여 공동주택의 수명을 최대한 연장시킬 수 있는 기초자료로 활용될 수 있을 것으로 기대한다.

CM 전문회사 단장 활용실태 및 개선방안

손창백,허영기,이동은,Son, Chang-Baek,Huh, Young-Ki,Lee, Dong-Eun 한국건설관리학회 2013 한국건설관리학회 논문집 Vol.14 No.2

국내 CM시장이 활성화됨에 따라 경쟁이 심화되어 실제 프로젝트 관리를 담당하는 CM단장의 능력은 CM사업 수주를 위한 중요한 요소가 되었다. 이로 인해 각 CM전문회사는 유능한 CM단장의 확보를 위해 현재 담당 프로젝트가 없더라도 후속 프로젝트의 수주를 위해 CM단장을 일정수 대기상태로 확보하고 있으나, 효율적인 활용방안에 대해서는 체계적인 방법이 마련되지 못한 실정이다. 이에 본 연구는 현재 CM전문회사가 보유하고 있는 대기상태 CM단장들의 활용실태 및 문제점을 분석하고, CM단장의 효율적인 활용을 위한 개선방안을 모색하기 위한 실무적 기초자료를 제시하고자 하였다. 본 연구결과, CM전문회사의 현재 대기상태 CM단장 인력수는 적정 비율 및 인력수에 비해 약 2배 정도 많은 것으로 나타났고, CM단장의 선정기준으로 프로젝트의 수주를 위해 프레젠테이션 능력을 가장 중요한 요소로 고려하고 있었다. 그리고 대기상태 CM단장의 보유 및 활용상 문제점은 크게 고용비용 증가와 현장 및 본사 업무지원능력 부족 및 제한적 활용으로 요약되었고, 대기상태 CM단장의 효율적인 활용을 위한 현장 및 본사 기술지원과 수주능력 강화 및 제도개선 등에 관한 개선방안을 제안하였다. The number of construction management firms has been increased as construction management delivery system has been active in Korean construction market. the capability of leading construction management professional, who is responsible for managing project administration, is important for commissioning construction management contracts. The quality of project proposal and the capability of leading construction management professional, which are assessed by the board of contract awarding committee, are the major contributors for commissioning the public construction management projects administered by the Korean public procurement service for contracting. Therefore, employing a very competent leading construction management professional is the critical strategy for awarding contract to the construction management firms' part. That is why the firms should secure a fixed number of leading construction management professional in a waiting list to proceed the contract commissioning process for expectant candidate projects, even if there is no project assignable to the leading construction management professionals. However, a measure that makes effectively use of the leading construction management professional in a waiting list has not been systematically implemented in the firms. In turn, the firm suffers considerable loss in a project personnel supply and demand plan. Expert opinions were obtained by the survey questionaries administered to top management of the construction management firms which are engaged in the construction management contracts for commissioning the public construction management projects administered by the Korean public procurement service either as principal or co-principal deliverer. This paper presents the findings obtained by investigating the actual employment state of the leading construction management professional in the waiting list and by analyzing the issues involved in mobilizing and demobilizing them. It contributes to implement a practical guide for searching effective solutions to the issues.

외국인 건설근로자의 고용에 대한 현장관리자 의식분석

손창백(Son Chang-Baek),이진우(Lee Jin-U) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.11

Though the demand of foreign laborer in the labor market of domestic construction is increasing, systems for managing and supervising them are insufficient. In order to resolve the problem of employing foreign laborer, the government made the Employment Permission System approved by the National Assembly in July 2003, and announced to run the existing Industrial Trainee System parallel with it from August 2004. However, the parallel running of the two systems has many potential problems such as legal status of foreign laborers flowed in and differences in treatment to them and in the subject of induction. The object of this study is to provide practical basic data to establish a system or a policy for efficient use of foreign laborers in the domestic construction industry. With the subjects of field managers who served in the domestic construction field, the actual state of using foreign laborers and the problems were investigated, and the consciousness on the existing employment system for foreign laborers and plan for improving system were analyzed and suggested.

기업 및 지역 건설노동조합의 운영실태 및 연대의식에 관한 비교연구

손창백(Son Chang-Baek),이덕찬(Lee Duck-Chan) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.7

Working environment of construction workers is very weak. They work for a living in 3D conditions; dangerous, dirty and difficult. They are most daily laborers, their employment is unstable. These problems make worse the demand and supply system of workers in the construction industry. The one measure to solve such problems is to activate the union actions. According to a new World Bank study on the effects of unions and collective bargaining in the global economy, workers who belong to unions earn higher wages, work fewer hours, receive more training, and have longer period of employment on average, than their non-unionized colleague. At the macroeconomic level, high unionization rates lead to lower inequality of earnings and can improve economic performance(in the form of lower unemployment and inflation, higher productivity and speedier adjustment to shock). This study aims to strengthen the solidarity of the Regular Worker's Construction Labor Union and the Daily Worker's Construction Labor Union, which were integrated in 1999. The study compares and analyzes their present conditions of the system operations, major activities and opinions on the solidarity, through the questionnaire and interview surveys.

표준품셈 제·개정 효율화를 위한 업무매뉴얼 개발

손창백(Son, Chang-Baek),신원상(Shin, Won-Sang),이동은(Lee, Dong-Eun) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.12

Construction Standard Production Unit system(CSPU) is used for estimating the cost of public construction projects. However, It is questionable if the reliability and/or authenticity of the system is acceptable because of the lack of consistent enactment and/or revision procedures. This study identifies the major issues relative to CSPU system, and develops work manual for efficient enactment and/or revision of the system. This study contributes to improve the authenticity of standard production unit data obtained from CSPU system. The improvement measures are established by obtaining and reflecting expert opinions from the estimating practice. The expert pool includes scholars, researchers, and practitioners who work for public institution, and public corporation.

국내 건설회사의 안전관리 수준분석 및 향상방안

손창백 ( Chang Baek Son ),이동은 ( Dong Eun Lee ),최승모 ( Seung Mo Choi ) 한국안전학회 2007 한국안전학회지 Vol.22 No.3

트랙터 적재형 스크레이퍼의 최적 장비조합 의사결정

손창백(Son, Chang-Baek),이형국(Lee, Hyung-Guk),이동은(Lee, Dong-Eun) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.2

Pusher-loaded scrapers are important construction equipment in large earthmoving operations. Productivity of a pusher-loaded scraper varies greatly with the temperature or elevation, equipment performance, haul speed, haul-road conditions, method of loading, and number of scrapers per one pusher. Determining of the most economical scrapers fleet demands time-consuming calculation regarding the size of equipment, model name, and number of scrapers because it requires references of numerous performance charts or tables and repetitive use of complicated calculation. Moreover, operating conditions, which contain changeable parameters depending on the time , exaggerate this time-consuming problem. In addition, the calculation consumes a huge amount of time because operation conditions contain parameters which are changeable overtime. This research suggests the optimum economical pusher-loaded scraper fleet(OPSF) system which facilitates calculation process and deals with parameters effectively to complete on operation in decision making stage. The prototype of this program is developed using MATLAB. This provides the graphic user Interface where attribute values related to an operation are specified. When the parameters of an operation are specified by users, the system computes the productivity of each equipment, compares completion times of the operation, and recommends the most economical equipment fleet.

건설현장의 근로자 편의시설 설치실태 분석 및 개선방안

손창백(Son Chang-Baek) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.4

As blue-collar construction workers are the critical source among production factors of the labor-intensive construction industry in Korea, the improvement of the labor environment including employment stability, realistic remuneration are emergently required. In view of this, the study, based on the associated primary data, attempts to analyze installation condition in construction sites and installation criteria in a large-sized construction company on the convenience facilities for construction site workers, and to investigate satisfaction level of the blue-collar construction workers on that ones. The study further suggests some realistic informations upon which the efficient improvement measures for the blue-collar construction workers possibly are prepared. The results of this study are provide practical basic data for establishment of realistic as well as reasonable policies/programs for the working milieu improvement.