• Korean Journal of Construction Engineering and Management
• /
• v.8 no.6
• /
• pp.216-226
• /
• 2007

The efficient vertical lift planning has been brought into relief in high-rise building construction projects. Particularly, the selection and stability examination of the tower cranes is the most important elements in vertical lift planning. Therefore, professional knowledge is needed to full fill the site condition for the plan. However, there are short of the number of specialists and information about tower cranes. This study proposes a system for the selection of the optimum tower cranes (Opt-TC) in high-rise building construction projects. The Opt-TC can give the selection and stability examination of tower cranes at once in real-time.

• Korean Journal of Construction Engineering and Management
• /
• v.9 no.6
• /
• pp.164-174
• /
• 2008

As buildings become larger, higher and more complex in most construction sites, construction projects have to deal with transportation of more materials, labor and equipment, necessitating more use of construction equipment. Notably, in the high-rise building and plant construction projects mobile cranes are adopted more frequently among different types of construction machinery, which also results in serious industrial accidents relating to the use of crane. To reduce serious industrial accidents involving cranes, researches on its stability is in need. The research herein aims to study how to select sling and lug of mobile crane and review its stability. The research outcomes herein will make considerable contributions to selecting mobile cranes efficiently and ensuring their stability.

• Korean Journal of Construction Engineering and Management
• /
• v.9 no.2
• /
• pp.190-198
• /
• 2008

Recently construction equipments have been used in line with building the structures that have become taller, larger and complex. And as the works at the elevated level for apartment and residential-commercial building projects have been on the rise, the number of tower cranes mobilized tends to be increased too. Due to such an increase in using the equipment serves the critical factor for the project management. The climbing-type tower crane, which increases its height following the structure, has been increased and the need for selecting the optimal model has been increasingly Important in securing the stability. The study hereby proposes the model to evaluate the stability of the climbing-type tower crane. The model was designed to assist in selecting the type of crane as well as in developing the design of Collar comprising the 3 types of support member, evaluating the stability and designing the embed. The model proposed is expected to make commitment in selecting the optimal type of equipment and evaluating the support member and embed for enhancing the stability, thereby ultimately enabling to implement the prefect in efficient way.

• Proceedings of the Safety Management and Science Conference
• /
• 2012.11a
• /
• pp.21-30
• /
• 2012

이동식 크레인과 관련한 안전사고가 다발하고 있음에도 국내 대부분의 건설현장에서는 아직도 관리감독자와 크레인 운전자의 경험에 의존하여 장비를 선정하고 운용하고 있는 실정이다. 본 연구를 통해 건설현장에서 발생한 이동식 크레인 전도사고사례와 위험성 평가를 실시한 결과 이동식 크레인을 이용한 안전한 자재 양중작업을 위하여 중량물의 무게 형상, 인양장비 제원, 정격하중, 작업반경 등을 고려한 중량물 취급작업계획을 작성 준수하고 이동식 크레인의 제작 설계기준 준수를 위하여 이동식 크레인 제조사에서 제공하는 사용(취급)설명서를 준수하며 위험성 평가 결과가 실제 이동식 크레인을 사용한 양중작업에 적용 가능하도록 지속적인 관리 등이 요구됨을 알 수 있었다.

• Journal of the Korea Institute of Building Construction
• /
• v.14 no.5
• /
• pp.407-413
• /
• 2014

Appropriate selection of lifting equipments for a high-rise building construction project is one of the important factors to the project's success. Proper position of a tower crane on a construction site is so important to be determined by an expert or an experienced construction manager who draws working range of a tower crane and moves it over 2D(dimensional) site layout plan. 3D CAD, BIM, and virtual reality are is used for building design and construction, but it is not usual to use them for temporary facility planning or selection of a tower crane. This study proposes a suitable method to use augmented reality to select proper position of tower cranes. An augmented reality prototype is implemented by Vuforia and Unity 3D on a smart device to verify the practicability of the proposed method. The prototype application installed on a smart device shows several tower cranes on different markers in a real architectural drawing to locate the proper tower crane.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2012.06a
• /
• pp.237-239
• /
• 2012

이적작업은 자동화 컨테이너 터미널에서 하역작업의 생산성을 높이는 중요한 운영 전략 중의 하나이다. 이는 장치장 크레인의 이동시간과 재작업을 줄이기 위해 장치장 블록 내 컨테이너들의 재배치하는 작업을 의미한다. 이적작업은 주로 크레인의 유휴시간에 수행되며 장치장 크레인의 추가적인 하역 작업을 요구한다. 이적작업계획이 수립된 후 작업할당 문제가 다루어진다. 크레인 작업할당 문제는 작업가능시간에 대한 제약을 고려하여 이적작업의 효과를 최대화시키기 위해 장치장 크레인이 처리할 이적작업을 선정하고 이들의 작업순서를 정하는 것이다. 본 연구는 혼합정수계획법을 이용하여 장치장 크레인의 작업할당 문제를 모형화 하고 실효적인 이용을 위해 수치실험을 통해 여러 작업할당 규칙의 수행도를 비교분석하였다.

• Plant Journal
• /
• v.8 no.2
• /
• pp.59-69
• /
• 2012

This study focuses on avoiding the failures from the wrong selections by experiences as simulation programs is not available, and suggests the methods which effectively select the alternatives when the selected model is not appropriate for the original plan. First, CC8800-1K of DEMAG has the longest boom whose length is 216 m at the maximum. The combination of the boom is feasible to second level except for MANITIWOC M 2250 (M-1200 RINGER) which is possible to third level. Second, the angle of boom is from 20 degrees to 82 degrees. Suitable angle to work is in the 55-78 degrees. The working load of crawler type and hydraulic one to be applied is 75-85% in the critical loads capacity. As increasing operating radius, crawler type is a favorable position over hydraulic one. Lastly, related problems were verified through examination by suggestions for the design of the selection methods for the case analysis. The major problems are stemming from the selection based on its experiences, unreasonable demand for the existing facility and repeated selections by the designer who accumulates his experiences via same or similar projects.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• autumn
• /
• pp.614-617
• /
• 2003

Recently the demand of constructing high-rised building grows larger. So it becomes more important to make an exact plan of a tower cranes which has an important position in high-rised building construction. Nevertheless businessmen of construction sites only depend on a great store of experience without a clear process of locating tower cranes. The object of this study is to set up the process model for locating tower cranes. The study went off through a study of related documents, an interview with some experts and a visiting of job sites. In result the study suggests a process model which has four steps of considering an establishing, disjointing, a radius of working, easy working. Case study was examined to estimate the feasibility and applicability of the proposed model. As a result, the model is proven to be a method to locate tower cranes quickly and cleary, and to operate properly as a decision-making tool.

• Journal of Navigation and Port Research
• /
• v.32 no.8
• /
• pp.621-628
• /
• 2008

Container terminals keenly compete with one another because of the continuous increase of container flows and the appearance of large-sized vessels. Major cargo handling equipment manufacturers are interested in the development of new conceptual equipment to greatly increase its productivity. In this study, a two-phase procedure is suggested for selecting the optimal development alternatives, when various development alternatives for container cranes are given. The first phase removes the alternatives that violate essential requirements and the second phase selects final alternatives by the evaluation of experts and the linear assignment method. Finally, a case applying the procedure is provided.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• v.1
• /
• pp.339-344
• /
• 2006

Container terminals compete with other ones because of the continuous increase of container flows and the appearance of large-sized vessels. Major port equipment manufacturers are interested in the development of new conceptual equipment ot greatly increase the productivity. In this study, a two-phase procedure is suggested for selecting the optimal development alternatives, when there are various development alternatives for container cranes, typical equipment in ports. The first phase removes the alternatives that violate essential requirements and the second phase selects find alternatives by using AHP (Analytic Hierarchy Process). Finally and example applying the procedure is provided.