Detect clashes

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Detect clashes

A clash is a structural conflict within a 3D model. Clash reports provide detailed views of the clashes in the 3D model, showing a clearance as a positive measurement and a clash as a negative measurement.

Parent topic: Work with 3D models

Create a clash report

You can create clash reports when you have a the 3D model view open.

  1. In the side pane, click Clashes.
  2. In the upper-right corner of the Clashes side pane, click .
  3. In the Clash set parameters dialog box, type the clash set name.
  4. In the Models in the clash set section, select at least 2 models in which you want to detect clashes.
  5. Select the report type:
    • Clash detection is used to find objects that collide or interfere with other objects with a specified tolerance.

    • Clearance detection reports are used to find objects that are within a specified distance of one another.

  6. Specify the clearance or tolerance.
  7. To leave out clashes within the same object type or element type, select the Ignore clashes within the same type check box.

    For example, this can be useful when you are detecting a clash between a wall and a pipe.

    By default, a clash report lists all clashes. For example, all clashes between walls are listed.

  8. In the Shared with list, find and select the users and user groups with whom you want to share the clash set.
  9. Click OK.

The new clash set is added to the Clashes side pane. Trimble Connect for Windows ensures that the model has been converted to a TrimBIM model, and then, runs the clash check.

You can see the status of the detection at the top of the Clashes side pane.

The clash report can be shared with other users or user groups.

View clash details

  1. To view all clashes in a clash report, in the Clashes side pane, click the arrow on the left side of a clash set.
  2. Find and double-click a clash whose details you want to see.

    The clashing objects, distance, and sharing information is shown.

  3. To select the clashing objects in the 3D view, click Select objects.

Re-run a clash check

To re-run a clash check without changing the clash report properties:
In the Clashes side pane, click on the right side of the clash report.

Modify clash set properties and re-run a clash check

  1. In the Clashes side pane, double-click the name of a clash set.
  2. To change the clash set properties, click Edit and re-run...
  3. In the Clash set parameters dialog box, modify the clash set properties according to your needs.
  4. Click OK to save the changes and re-run the clash or clearance detection.

Delete a clash report

In the Clashes side pane, click on the right side of a clash set or a clearance report.