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Best Practices: Filter and Group Clashes

You can search and filter aggregated model views, drill down into specific clash interferences, set clash tolerances, and automatically group clashes in the viewer. Using these tools, architects, engineers, and BIM managers can collaborate to clear clashes, assign issues, solve small problems, and prioritize larger problems for an upcoming coordination meeting.

In the Model Browser tab, use the basic and advanced object filtering to select specific model objects to investigate further and filter out clashes associated with these objects. In the Clashes panel, use the tools described below.

Select content to clash

When you have the Clashes panel open in the viewer, and have more than two models open, you must choose which content you want to view clashes between. Choosing specific models, rather than all, provides more targeted results for review.

Apply a tolerance

Apply a clash tolerance that filters out clashes with an acceptable amount of overlap (in mm or inches). Set the tolerance filter to above, below, or between values, to mark known installation tolerances as Not an issue or focus on high impact clashes.

Group clashes

Clash groups make it easy to assign issues by discipline or trade.

Group clashes by multiple properties at once, with useful properties saved for you in the Common properties section. Some of these are:

  • Level - Contains the Revit level of the object, based on an aggregate of the properties named Level, Base Level, Reference Level, and Base Constraint.
  • Category - Contains the Revit category of the object.
  • Default Grouping - Contains the first-level grouped properties described here. They are useful for exporting views containing multiple file formats.
  • Default Subgrouping - Contains the second-level grouped properties described here. They are useful for exporting views containing multiple file formats.
  • Family / Type - A combination of the Revit family name and family type name with a ':'.
Note: Properties such as systems, types, and layers are typically used in CAD to group objects with related function or location. They are defined in the design software that the models are created in, therefore the options available depend on the model file type. It may be useful to view clashes using these groupings, as related objects are likely to be affected by the same clashes.

Save clash checks

Once your clash panel is configured, save clash checks to allow easy reuse later. Saved clash checks allow you to eliminate repetitive set-up, standardize clash detection, and reduce the number of clicks to get to the right information. They help you to provide tailored clash checks for specific disciplines and projects phases.

For more details, see Filter and Investigate Clashes.

Parent page: Best Practices for Using Model Coordination

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