When it comes to BIM Technology, many people in China often discuss the benefits of collision detection, such as early prediction, reducing rework, and cutting costs. Today, the editor from BIM Architecture Training Network would like to share insights about the different types of collision detection based on BIM technology.
1. Hard Clash: This occurs when two entities physically intersect in space. Hard clashes are very common during the design phase, especially when there is no unified elevation across different disciplines. Typical examples include intersections between structural beams, air conditioning ducts, and water supply and drainage pipelines.
2. Space Clash: In this case, Entity 1 and Entity 2 do not intersect, but the distance d between them is less than a predefined tolerance T, which is considered a collision. This type of clash detection primarily addresses safety concerns. For instance, minimum spacing requirements exist between plumbing pipelines and electrical bridge frames or busbars. By setting these minimum spacing standards between disciplines, it becomes possible to verify whether the spacing meets design requirements. Additionally, it helps check if pipeline equipment obstructs wall-mounted sockets, switches, or other fixtures.
3. Single-Discipline Collision Check: This method involves checking for collisions within a single discipline only. It is relatively straightforward. Designers can import the model for a specific discipline into software like Navisworks and perform the analysis directly.
4. Multi-Disciplinary Comprehensive Collision Inspection: This involves detecting clashes between multiple systems, such as HVAC, plumbing, electrical pipelines, and structural components. To ensure accurate and efficient analysis, two key points should be considered:
- First, the number of pipeline entities inside a building is huge, and their layout is complex. Performing collision detection for all entities at once can slow down the computer’s performance and affect display speed. To maintain high display speed and clarity, it’s best to minimize the number of entities shown at any time, often by conducting checks floor by floor.
- Second, considering professional drawing conventions, it is important to be able to check pipeline equipment across adjacent floors simultaneously. For example, air conditioning pipelines might be represented on one floor, while many drainage pipelines (from the plumbing discipline) physically run through the floor above.
That concludes our discussion on the types of collision detection based on BIM technology. We hope this provides you with a deeper theoretical understanding of collision checks. For more information, please visit our official website: BIM Building Training Network.
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