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Understanding the Different Bim Dimensions

Building information modelling (BIM) covers the multidimensional processes involved in creating and managing information required throughout the life of a construction project.

BIM Dimensions evolved from the need to differentiate modelling geometry in multiple dimensions. 2D and 3D modelling bring drawing boards to life using 2D CAD systems and 3D modelling packages.

Now BIM goes further and draws benefits from the addition of further information termed as 5D, 6D, 7D and 8D, which bring elements together to ensure that project dimensions and constructional information is fully integrated into the construction model.

What Bim Services Are Available?

Here we look at the different elements that contribute to the BIM services available from companies such as The CAD Room, experts in using the power of BIM to deliver a range of services as an outsource partner to the building services industry.

Choosing a company with experience in all BIM modelling dimensions ensures that you have a cost-effective solution available when you need assistance for your construction modelling and building projects, whatever stage in the cycle you are at.

Understanding the versatility and assistance that various BIM dimensions can bring to your construction and building services is essential if you take full advantage of this revolutionary capability to enhance building possibilities in our mission for better buildings.

2D BIM

Perhaps a questionable part of BIM, this geometric model brings together an X and Y axis that can be associated with further information digitally. Advanced modelling now allows the addition of constraints, concepts and parameters.

3D BIM

A Z-axis gives further dimensions to the X and Y axis to enable other geometric capabilities within designs and facilitate linking to 3D modelling packages.

4D BIM

4D BIM provides the technology to enable scheduling information to the model construction sequences. Project teams can then better visualise the steps and sequencing essential for contractors to deliver projects on time and within budget.

4D BIM provided a platform for the much-needed collaboration between designers and construction teams and easy sharing of 3D models and project updates.

5D BIM

5D BIM allows cost information to be added to the build model. Factors to be considered within the scope of the 5D modelling include answers to questions such as:

  • Are costs expected to be as-built or pre-tender values?
  • Should teams provide operational or capital costs?
  • Who is to add the cost information?
  • What measurement methods are to be adopted?

6D BIM

6D BIM allows for facility management information. What this cover is as yet not set in stone, being open to interpretation as to how much this covers.

Therefore, the 6 D BIM dimension scope should form part of discussions with your BIM services provider to identify rules and units to be incorporated into your BIM construction project landscape.

7D BIM

This covers the sustainability information for the build and ongoing use of the building. Again, this is an area where scope and expectations should be set when defining BIM expectations.

8D BIM

The addition of Health and Safety information comes within 8D Building information modelling, again requiring clear scope and definition to be set to identify data types, units, rules of measure and other pertinent project aspects that become part of your building model.

Building information modelling has been in focus for some years now. As can be seen, developments have the scope to include or exclude some elements and for BIM project definition to be tailored to individual projects.

The UK Government has been committed to using BIM technology for building and construction for around a decade, focussing on adopting BIM infrastructure into their government construction strategy and centrally procuring construction projects delivered since 2016.

The aim is to ensure that they reach cost savings on capital projects and have better buildings for their budget and the environment.

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