Journal of KIBIM (한국BIM학회 논문집)

Korean Institute of Building Information Modeling (한국BIM학회)
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An Accuracy Analysis on Quantity Take-off Using BIM-based Spatial Object

BIM 기반의 공간객체를 이용한 물량산출 정확성 분석

  • 차유나 (성균관대학교 대학원 미래도시융합공학과) ;
  • 김성아 (성균관대학교 건설환경시스템공학과) ;
  • 진상윤 (성균관대학교 건축공학과)
  • Received : 2014.12.07
  • Accepted : 2014.12.21
  • Published : 2014.12.31
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Abstract

After being introduced, Building Information Modeling (BIM) has been actively applied to the cost estimation of construction projects, and various studies on BIM based quantity take-off have been carried out. In practice, however, these calculations take considerable time, because BIM based quantity take-off is further conducted along with 2D-based quantity take-off. Studies on the quantity take-off using BIM spatial objects have been carried out on early stages of projects, but how this method differs from the existing quantity take-off method and how accurate it is in comparison have rarely been verified. Therefore, by comparing 2D based quantities with quantities through BIM spatial objects, this study analyzed the accuracy of quantity take-off using BIM spatial objects. To this end, the properties of BIM spatial objects and quantity calculable spatial types were analyzed, and existing 2D-based quantities and quantities extracted from BIM spatial objects were compared through a case study. As a result, the quantity of spatial objects found to be more by about 7.13% in 0.05% and therefore, this difference should be considered during quantity take-off using BIM spatial objects. Through the results of this study, we can improve the accuracy of quantity take-off using BIM spatial objects in the early stage of a construction project.

Keywords

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