• Revit
  • Navisworks Manage

Perform a clash test in Navisworks Manage

Select objects and perform a clash test in Autodesk Navisworks Manage.


00:03

With the Clash Detective tool in Navisworks,

00:07

you can define clash tests and identify interferences between objects in a model

00:13

to effectively resolve problems during the design stage.

00:17

To perform a clash test, begin with a model already open in Navisworks Manage.

00:24

Then, on the Home ribbon, in the Tools panel, click Clash Detective.

00:29

The Clash Detective window displays.

00:32

From this dockable window, you can set up and run your clash tests, view and sort the results, and create clash reports.

00:42

To define a new clash test, click Add Test.

00:47

A new test displays in a table.

00:50

Click in the Name field and enter a descriptive name for the test you wish to run, such as “MEP and Structure”.

01:00

From the Select tab, two selection panes display.

01:05

In each pane, select the items you want to compare.

01:09

You can select entire models, or expand a model and choose specific levels, categories, or families to test against each other.

01:20

Notice that each selection also contains a drop-down list that replicates the current state of the Selection Tree window.

01:29

From the drop-down, choose Standard to display the default tree hierarchy,

01:35

Compact to display a simplified version,

01:39

Properties to display a hierarchy based on properties of items,

01:44

or Sets to display the same items as on the Sets window.

01:49

In this case, Selection B is set to a Compact hierarchy.

01:54

Clash testing can be faster, more effective, and easily repeatable if you use selection and search sets.

02:03

You can further refine the type of geometry you want to clash test using the buttons below the Selection A and Selection B panes.

02:13

Clash tests can include the clashing of surfaces, lines, or points of the selected items.

02:20

Use the default Surfaces tool to test item surfaces.

02:24

Select Lines to test clashes of items with center lines, such as pipes.

02:31

Select Points to test clashes with points or lasers.

02:36

To test the geometry selection in the pane against itself,

02:41

in addition to testing it against a geometry selection in the other pane, select Self-Intersect.

02:48

Use Current Selection to select geometry for clash testing directly in the Scene View, and in the Selection Tree dockable window.

02:58

Choose Select in Scene to set the focus in the Scene View and in the Selection Tree dockable window

03:06

to be the same as the current selection in the Selection pane on the Select tab.

03:13

In the Settings group box, expand the Type drop-down and choose from four clash types:

03:21

Hard identifies objects that physically intersect.

03:25

Hard (Conservative) treats objects as intersecting even if their geometry triangles do not intersect.

03:34

Clearance treats objects as intersecting when they come within a specified distance.

03:40

Note that selecting this clash type also detects any hard clashes.

03:46

You might use this type of clash when pipes need to have space around them for insulation, for example.

03:54

Duplicates identifies objects that are identical both in type and position.

04:00

This type of clash testing might be used to clash the entire model against itself,

04:06

enabling you to detect any items in the scene that might have been duplicated by mistake.

04:13

In this instance, the Type is set to Clearance.

04:17

In the Tolerance field, control the severity of the clashes reported and the ability to filter out negligible clashes,

04:25

which can be assumed to be worked around on site.

04:29

The tolerance quantity entered is automatically converted to the Display Units.

04:35

So, for example, if the display units are meters and you type “6 inch”, this will be automatically converted to 0.15 m.

04:47

Expand Link.

04:49

Here, you can link a clash test to a TimeLiner schedule or an object animation scene.

04:57

Once you have specified everything you want, click Run Test.

05:02

Once the test has run successfully, the Results tab displays.

05:07

From the list, select a clash to view it in the drawing area.

05:12

In the drawing area, zoom and orbit the model to review the selected clash.

05:19

Next, open the Report tab.

05:22

From the Contents list, select what to include in your report, from summary to grid location.

05:29

From the Include Clashes group, choose which clashes to include based on status.

05:36

Then, from Output Settings, expand the Report Type drop-down.

05:42

Here, you can choose to create a report on the current test or all tests.

05:47

If you want a report on all tests, you can also decide to have the tests separated or combined.

05:55

For now, select All tests (combined).

05:59

Next, expand the Report Format drop-down to configure which format you wish for the report to be exported as.

06:08

In this case, HTML (Tabular) is chosen.

06:13

Click Write Report to generate a report with the clashes.

06:18

In the Browse For Folder dialog, choose where to save the report and click Save.

06:25

A loading dialog displays as the report is being created.

06:30

If the report does not automatically display, navigate to the file you just saved and open it.

06:38

In this example, the HTML tabular report includes thumbnail images and other details for each clash detected.

Video transcript

00:03

With the Clash Detective tool in Navisworks,

00:07

you can define clash tests and identify interferences between objects in a model

00:13

to effectively resolve problems during the design stage.

00:17

To perform a clash test, begin with a model already open in Navisworks Manage.

00:24

Then, on the Home ribbon, in the Tools panel, click Clash Detective.

00:29

The Clash Detective window displays.

00:32

From this dockable window, you can set up and run your clash tests, view and sort the results, and create clash reports.

00:42

To define a new clash test, click Add Test.

00:47

A new test displays in a table.

00:50

Click in the Name field and enter a descriptive name for the test you wish to run, such as “MEP and Structure”.

01:00

From the Select tab, two selection panes display.

01:05

In each pane, select the items you want to compare.

01:09

You can select entire models, or expand a model and choose specific levels, categories, or families to test against each other.

01:20

Notice that each selection also contains a drop-down list that replicates the current state of the Selection Tree window.

01:29

From the drop-down, choose Standard to display the default tree hierarchy,

01:35

Compact to display a simplified version,

01:39

Properties to display a hierarchy based on properties of items,

01:44

or Sets to display the same items as on the Sets window.

01:49

In this case, Selection B is set to a Compact hierarchy.

01:54

Clash testing can be faster, more effective, and easily repeatable if you use selection and search sets.

02:03

You can further refine the type of geometry you want to clash test using the buttons below the Selection A and Selection B panes.

02:13

Clash tests can include the clashing of surfaces, lines, or points of the selected items.

02:20

Use the default Surfaces tool to test item surfaces.

02:24

Select Lines to test clashes of items with center lines, such as pipes.

02:31

Select Points to test clashes with points or lasers.

02:36

To test the geometry selection in the pane against itself,

02:41

in addition to testing it against a geometry selection in the other pane, select Self-Intersect.

02:48

Use Current Selection to select geometry for clash testing directly in the Scene View, and in the Selection Tree dockable window.

02:58

Choose Select in Scene to set the focus in the Scene View and in the Selection Tree dockable window

03:06

to be the same as the current selection in the Selection pane on the Select tab.

03:13

In the Settings group box, expand the Type drop-down and choose from four clash types:

03:21

Hard identifies objects that physically intersect.

03:25

Hard (Conservative) treats objects as intersecting even if their geometry triangles do not intersect.

03:34

Clearance treats objects as intersecting when they come within a specified distance.

03:40

Note that selecting this clash type also detects any hard clashes.

03:46

You might use this type of clash when pipes need to have space around them for insulation, for example.

03:54

Duplicates identifies objects that are identical both in type and position.

04:00

This type of clash testing might be used to clash the entire model against itself,

04:06

enabling you to detect any items in the scene that might have been duplicated by mistake.

04:13

In this instance, the Type is set to Clearance.

04:17

In the Tolerance field, control the severity of the clashes reported and the ability to filter out negligible clashes,

04:25

which can be assumed to be worked around on site.

04:29

The tolerance quantity entered is automatically converted to the Display Units.

04:35

So, for example, if the display units are meters and you type “6 inch”, this will be automatically converted to 0.15 m.

04:47

Expand Link.

04:49

Here, you can link a clash test to a TimeLiner schedule or an object animation scene.

04:57

Once you have specified everything you want, click Run Test.

05:02

Once the test has run successfully, the Results tab displays.

05:07

From the list, select a clash to view it in the drawing area.

05:12

In the drawing area, zoom and orbit the model to review the selected clash.

05:19

Next, open the Report tab.

05:22

From the Contents list, select what to include in your report, from summary to grid location.

05:29

From the Include Clashes group, choose which clashes to include based on status.

05:36

Then, from Output Settings, expand the Report Type drop-down.

05:42

Here, you can choose to create a report on the current test or all tests.

05:47

If you want a report on all tests, you can also decide to have the tests separated or combined.

05:55

For now, select All tests (combined).

05:59

Next, expand the Report Format drop-down to configure which format you wish for the report to be exported as.

06:08

In this case, HTML (Tabular) is chosen.

06:13

Click Write Report to generate a report with the clashes.

06:18

In the Browse For Folder dialog, choose where to save the report and click Save.

06:25

A loading dialog displays as the report is being created.

06:30

If the report does not automatically display, navigate to the file you just saved and open it.

06:38

In this example, the HTML tabular report includes thumbnail images and other details for each clash detected.

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