You can use clash check to find clashes between reference model objects, pour objects, point clouds, and between these objects and native Tekla Structures objects, and inside reference models and Tekla Structures models.

1. On the Manage tab, click Clash check .
2. In the Clash Check Manager dialog box, select the appropriate clash check settings. The settings you select here determine what is included in the clash check.

   • Between reference models

     Clashes between reference models are included in the clash check.

   • Objects in reference models

     Clashes within reference models are included in the clash check (bolts and welds are not included).

   • Between reference models and components

     Clashes between reference models and components are included in the clash check.

     When you have the whole component and this setting selected, the component parts are included in the clash check.

     Note that if you have the Select objects in components selection switch active to already select the parts in the component, the Between reference models and components setting does not have any effect, even if you have the check box selected in Clash check manager.

   • Between parts

     Clashes between native Tekla Structures parts are included in the clash check.

   The advanced options related to these settings are: XS_CLASH_CHECK_BETWEEN_REFERENCES, XS_CLASH_CHECK_INSIDE_REFERENCE_MODELS, and XS_CLASH_CHECK_BETWEEN_PARTS. Changing the settings in the Clash Check Manager dialog box does not affect the values set in the advanced options. When you open another model or restart Tekla Structures, the settings in the Clash Check Manager dialog box are reset to match the advanced option values.

3. Set the Minimum distance between reference model objects, pour objects, and point clouds, and between these objects and and native Tekla Structures parts.

   Objects that are closer to each other than the set minimum distance are reported in the clash check list. You can filter out minimum distance type clashes from clash check results by setting the minimum distance value to 0.0.

   You can define a minimum distance value within the range from 500 mm to -500.0 mm. By using a negative minimum distance, you can define how much overlap is allowed without reporting a clash.

   When checking the minimum distance, Clash check manager uses the Tekla Structures units set in File > Settings > Options > Units and decimals.

   Note that Tekla Structures uses a hard-coded tolerance when checking clashes between native parts. If native parts overlap less than 0.25 mm, clashes are not reported.

4. In the model, select the objects you want to include in the clash check.
5. Click to check the objects.

   The status bar in Clash Check Manager indicates that clash checking is in progress.

   Tekla Structures also displays a dialog box with a clash check progress bar. The progress bar first shows the clash check progress for Tekla Structures objects, and then for reference model objects and pours. You can cancel the clash check in the dialog box.

   When the clash checking is finished, the status bar in the Clash Check Manager dialog box shows a message about listing the clash check results and a progress bar that indicates how long it will take to add all the clashes to the list of clashes. When the listing is complete, the status bar message changes to Ready.

6. To highlight a clash in the model, select a row in the list of clashes.

   The related model objects are selected.

7. To zoom the active view so that the selected objects are shown in the center of the view, double-click a row.

   To zoom to and highlight a clashing object when there is only one clash in the list of clashes, right-click the clash in the list of clashes and select Clash Information.

8. If you want to include more objects in the clash check, select the desired model objects and re-run the clash check.

   New clashes are appended to the end of the list.

9. After removing or modifying objects, re-run clash check to see if the clash still exists.
   1. Select the desired rows in the list of clashes.
   2. Click to re-run clash check.