There are a number of add-on products for ArchiCAD that can assist in the automation of digitally capturing this data (Orthograph, Flexijet and ArchiMap). Traditional surveying may provide a set of drawings which need to be imported and then modelled up, which while easy isn’t probably the best use of time. SurveyĬapturing the existing structure can be carried out in a number of ways. New energy calculations will need to be run on the upgraded structure and then clearly handled in producing demolition and construction documentation. The system would be accurate to produce the correct quantity calculations for the new elements and as the majority of energy-saving retrofit jobs will include pipework, Mechanical, Electrical Plumbing (MEP) elements will be essential.
The next step is to indicate which parts of the building need to be demolished with some automation in identifying elements/breaking up existing elements and auto filling of holes, as well as some way of identifying new structure versus existing structure. This survey feeds into the BIM system and a model is produced. So how can BIM best support renovation workflows? In Graphisoft’s view of the process, the first task is to capture the as-built conditions and this is usually done via a survey. While, as usual, there are a plethora of new features in ArchiCAD 15, with updates and enhancements, we have split this review into two renovation this month and then the nuts and bolts general functions in the September / October edition of AEC Magazine. In 2009 you would have been hard pressed to find any serious renovation features in the popular BIM tools, now it’s deemed a competitive necessity.
The renovation market in the UK is expected to be worth £46 billion in 2012. This comes amid a general trend from Building Information Modelling (BIM) software developers to deal with as-built structures in a much more inclusive manner to meet the change in project mix of their customers. Perhaps it is well timed that the latest version of Graphisoft’s BIM modeller, ArchiCAD 15 comes with a suite of new capabilities specifically targeted at improving the workflow of renovation and retrofit projects.
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