3D BIM models

CAD vs. BIM - the crucial difference

A BIM model not only describes geometry, but also the structure and function of each component. Walls, ceilings and doors are clearly classified and structured in multiple layers - with materials, thicknesses and functions. The model is supplemented with specific information from specialist planner plans. This creates a structured basis on which architecture, technology and the supporting structure can work together seamlessly - and conflicts can be identified at an early stage.

How your BIM model is created

Laser scanning of the buildingThe building is completely recorded using 3D laser scanners. The georeferenced point cloud forms the geometric basis - accurate to the millimeter, from the basement to the roof beams.

Modeling with structured component informationThe point cloud is used to create a component-based model in ArchiCAD or Revit. Each element - wall, ceiling, column, opening - is placed geometrically correctly and provided with type, function and attributes.

Extension with as-built informationExisting 2D plans, engineering plans, exploratory reports and as-built documentation are included and integrated into the model. This creates a digital image that shows more than the point cloud alone.

IFC export & deliveryThe finished model is delivered as a native project file and IFC export - ready for interdisciplinary coordination, the exchange of specialist planners and handover to the client.

What the BIM model does

Coordination between architecture, building services and structural engineeringAll specialist planners work on the same structured database. Collisions, planning contradictions and missing information are identified at an early stage - before they become expensive on the construction site.

Structured component and building dataRooms, areas, component quantities and building structures can be called up digitally. This speeds up evaluations, cost calculations and quality checks in all project phases.

Long-term data valueThe BIM model remains useful beyond the initial modeling: for subsequent conversions, extensions, operation and facility management. Once created, permanently usable.

Typical applications

• Conversions and renovations with several specialist planners
• Projects with BIM requirements by the client or general planner
• Existing building developments with building services and structural engineering involvement
• IFC-based coordination models
• Digital building documentation with component information
• Handover to TGA planner, structural engineer or general planner
• Basis for facility management with component basis

Who is a 3D BIM model suitable for?

BIM as-built models are suitable for anyone who plans existing buildings in a coordinated and interdisciplinary manner:

• Architectural firms
• general planners
• Building services planners (HVAC)
• Structural engineers
• Building owners with BIM requirements
• Facility managers

VDE and Scan2BIM

VDE has specialized in Scan2BIM modelling for over fifteen years. Our models are created in ArchiCAD, Revit, Allplan and Vectorworks, delivered as native files and also as IFC and are geared towards the requirements of coordinated planning in existing buildings - with projects throughout Switzerland.