Armering och BIM - En kartläggning av armeringsprocessen och möjliga förbättringar

Sammanfattning: In the current reinforcement steel supply chain the information transmission is often done with 2D-documents. This practice prevails even when structural engineers create complete building information models containing all reinforced concrete. In some cases, the contractor uses the rebar drawings to once again create a 3D model, containing the rebar, to provide views for rebar workers to be used during assembly. Twice the work means unnecessary costs and increased lead time. This report maps the current reinforcement steel supply chain and investigate which improvements can be made and how BIM can be utilized to improve the supply chain. The goal of the study is to investigate if the time put by the structural engineer on the reinforced building information model generates savings throughout the construction supply chain. The work is mainly based on interviews with different actors in the reinforcement steel supply chain. Actors with different tasks and working for different companies were selected. The rebar supply chain has shown to be project specific and the interviews have given an overview of the different ways of working throughout the supply chain. The first interviews highlighted some of the main issues experienced throughout the supply chain. Some of these issues include the lack of feedback among the different actors and bad communication practices. Furthermore, the possibility for pilot projects were also requested, since the actors often lack opportunities to try new ways of working. The technical solutions are not the obstacle in the development of the reinforcement steel supply chain. It is rather organizational. The authors’ conclusion is that the communication between the actors must be improved and a larger knowledge exchange is needed. Implementation of BIM is not an improvement of the CAD supply chain, but a new way of working. Using BIM throughout the supply chain can generate savings. Moreover, shorter lead time, fewer errors and more distinct information management are just a few of the positive effects. Another conclusion is that the rebar actors must find more standardized ways of working. Today, different actors in the construction industry work differently from project to project. The double work in some parts of the supply chain could easily be avoided if a building information model would be implemented from the start and throughout the project development process. For that to happen the knowledge of BIM would have to increase for all actors in the reinforcement steel supply chain. The authors have tried to answer the uncertainties in the supply chain and explain how BIM can better be adopted. Suggestions have been presented about alterations for the different actors and how the reinforcement steel supply chain can be improved.