The application of clash-detection processes in building information modelling for rebars

Building information modelling (BIM) is the key component in a digital revolution that is modernising the construction industry across the globe. This paper discusses the issues around rebar clashes in construction projects. Clash detection is an integral part of the BIM process. However, it is often overlooked in relation to reinforcing bars because this work often happens on-site. The underutilisation of a BIM-based rebar clash analysis can cause greater inefficiencies on the building site. The first part of this paper provides general information about these clashes and their categorisation and probable causes. The second part discusses the benefits of performing BIM-based clash detection on rebar. These benefits are evidenced by a practical example. The third part of this paper focuses on processing the clash-detection results to deliver BIM models without rebar clashes. This is achieved with a simple formula that has been adopted to quantify the efficiency of traditional and BIM-based clash-detection processes on rebar. Finally, the focus shifts onto how the results of these BIM model analysis can be communicated to the construction team for effective implementation at the project site.