Prompt Engineering Academy

BIM for existing buildings

        There have been attempts at creating a BIM for older, pre-existing facilities (Sydney Opera House being a fine example). These generally reference key indicators, such as the Facility Condition Index (FCI). However, the validity of these models needs to be monitored over time; trying to model an existing building would require numerous assumptions about design building standards and codes, construction methods and materials available at the time of construction; especially when considering conservation and old buildings.

    With the correct mix of technologies it is possible to create 3D models stored as dense cloud points. This makes it possible to scan rooms, and update the 3D and 4D models. Laser scanning also offers the ability to quickly validate construction work carried out in relation to what was expected or designed. This can obviously greatly increase quality as this validation will force contractors to ensure the construction is carried out as per the drawings as it will be noted in progress reports.

     It is clear that BIM and 4D scheduling has dramatic potential benefits to all stakeholders involved in the construction industry. However, it must be driven by the client or owner of the project and there must be a buy in to the process from all stakeholders involved, its implementation will offer considerable future challenges; primarily in the initial investment required. Hardware, software, education and training costs may slow this process considerably; without governmental support, BIM is unlikely to become the norm in the near future. Previously it was difficult to justify the use of full BIM on smaller scale projects. However, PAS 1192 is scalable so the process can now be used for big or small buildings. While smaller scale often implies less complex, a large warehouse in the middle of an industrial estate is not as complex as a small London town house extension; especially when location etc. is factored in. The level of expertise to use full BIM would require a certain physical number of professionals who were able to carry out the various tasks. In many cases, the physical numbers allocated to smaller projects would make this impossible.BIM as a construction management training and education tool is a very positive advancement. Colleges and Universities are already using it to give their students virtual problems which can help their understanding and give them experiences they can currently only learn on-site.