3D/4D/5D BIM

Question 1

What is 3D BIM?

Answer 1

• Graphical, non-graphical and document and sharing in a CDE.
• Can be used for walkthroughs and visualisation.
• Clash detection.

Question 2

What is 4D BIM?

Answer 2

• 3D + sequencing.
• Animation that shows the construction of the project over time.

Question 3

How is 4D done?

Answer 3

Create a schedule/sequence, upload to appropriate software, link elements to the scedule, run animation.

Question 4

What are pros and cons of 4D BIM?

Answer 4

Pros:
- Construction related clashes can be discovered and safety improved.
- Can be good visually for stakeholders/clients.
- Shows how the site interacts with the external areas.
Cons:
- FlashBIM
- Models and sequence need to be accurate

Question 5

What is 5D BIM?

Answer 5

• 4D + costing
• Automatically updated via the model so speeds up process of costing.

Question 6

What are the pros and cons of 5D BIM?

Answer 6

Pros:
- Can help with cashflow management.
- More efficient than a manual take-off.
Cons:
- If the info is inaccurate, the calculations may be wrong.