3D Modelling is not new as it has been used in the automotive and avionic industry for the last 40 years, and is being used in the construction industry for complex projects. For example, all projects by the prestigious Norman Foster Architects are designed in 3D.

BIM (Building Information Modelling) is an extension of the 3D model to involve all parties in the design team allowing revision and design development to be fully coordinated.

		What is BIM and what are the principles and benefits?
		The model is generated from an architectural schematic usually a site plan of a proposed development. The actual model is produced as if drawing in 2D but with a third dimension giving height and volume. The model contains significant data such as quantities, specifications and virtually any other elemental data required such as carbon footprint, weight, acoustic, thermal and H&S information... It will require input from the other disciplines also forming part of the team such as structural engineer, civil engineer, mechanical engineer, electrical engineer, architect or designer. From this model, an energy consumption calculation of the building will be done and simulation can be produced by changing the parameters, the frame design will be directly imported from the consultant, and compliance with L2A could be obtained instantly. The model is built up from "smart objects" which contains all of the data required. Advantages: this model is acting as a unique engineering platform upon which all the project team will work. Subcontractors do not need any 3D capacity. 2D information can be extracted from the model, amended, re-exported into the model and the model will be automatically adjusted. Although this approach requires more input at an early stage in the project, there is no longer any coordination problem, and any discrepancy within the model will automatically been highlighted. Anti clash systems will prevent pipes ducts and structure from unseen collision. This will reduce painfull design coordination between architect, consultant and subcontractors drawings, reduce poor details on site leading to poor quality and errors. The quality of the building would then be improved significantly. Furthermore, the complete O&M manual could be extracted from the model in the format required by the client, with the assurance that all of the information is in accordance with what has been built on site. BIM is becoming a buzzword in building design. Few use it and even fewer use it to its full potential. The advantages are enormous and will enable GSE to be at the forefront of design and build excellence. GSE is currently developing a 3D Model on one project in UK.