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Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
Professional CAD/CAM tools built on Inventor and AutoCAD
Select objects and perform a clash test in Autodesk Navisworks Manage.
Type:
Tutorial
Length:
7 min.
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.
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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