How Do You Differentiate Between BIM Dimensions?

1. Two-dimensional line work (Drafting), 2D BIM
   • Typically, 2D modelling involves using computer generated drafted lines to represent an object such as the wall shown
   • An example of this is the diagram to the right; At this point however, it isn’t a wall it is a rectangle filled with patterns which is recognized as a wall
   • It is worth noting that traditional drawings are 2D, so this is not an exclusive BIM term
2. Three dimensional (Object Models), 3D BIM
   • Following further industry developments, following the advent of 3D object modelling, instead of using lines, we now have 3D objects.
   • As part of this process the objects each have data attached
   • From the attached data you can define its height, width, depth and even apply specification information
   • The data can exist as part of the model or be referenced from another database or other source and referenced to the model
3. Time (Construction programming), 4D BIM
   • In construction, when we talk about the 4th dimension, we typically refer to time
   • Typically, this stage involves integrating the project program with the 3D model
   • This can be done either by including constructed and demolished program information or assigning it through additional software
   • It is worth noting that Traditional project programs are an example of 4D
4. Cost estimation, 5D BIM
   • Typically, 5D involves the use of additional software to complete take-offs and apply additional costs
   • However, to carry out effective 5D modelling there are also complex requirements and modelling techniques to enable effective cost take-offs
   • A traditional cost estimate is an example of 5D. It is also worth noting these dimensions are not sequential and a 5D object may not include any 4D data
5. Sustainability, 6D BIM
   • It’s a process for developing project sustainable design strategies.
   • Used for building and open space energy analysis.
   • Natural and artificial lighting design.
   • CFD analysis
   • Energy virtualisation and modeling.
   • Construction documentation and material/systems specifications.
   • Coordination and management of passive design element constructions.
   • Building energy consumption auditing and monitoring.
6. Facility Management, 7D BIM
   • Programming – Using a spatial program to assess a design’s performance and effectiveness relative efficiently and accurately to the spatial requirements.
   • Record Modeling – Creating an accurate depiction of the physical conditions, environment, and assets of a facility.
   • Preventative Maintenance Scheduling – Tracking and maintaining lifecycle information about the building structure as well as the equipment serving the plan and schedule a program of maintenance activities that will improve building performance, reduce repairs, and reduce overall maintenance costs.
   • Asset Management – Linking data in a BIM record model to a database of building assets to assist in efficiently maintaining and operating the facility.
   • Space Management and Tracking – Allocating, managing, and tracking spaces and related resources within a facility.

For more information on BIM, please feel free to contact us at info@vanbower.com.