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further highlighting the problem objects. Select the Transparent Dimming option, allowing you to see
through the objects not involved in the clash.
The clashing items are highlighted in red to signify that it is a newly found clash (there are other colors for
clash management that we will not go into here).
The clash draws our attention to a section of the superstructure passing through a section of ducting. Details
of the clashing items are shown at the bottom of the Results tab making it easier to identify them.
12 Auto Hide
the Clash Detective window.
As part of the review process a decision has to be made whether to approve a clash, or whether action needs to
be taken. Autodesk Navisworks provides tools to add comments and markup to clash results which can be
recorded and kept as part of an audit trail, or passed back to the engineering teams advising to re-route the
ducting, for example. Once any changes to the original CAD files have been made, the clash test can be re-run
to determine whether the change has resolved the clash, and to also check that the change hasn’t resulted in a
clash with another item.
4D Construction Simulation
Autodesk Navisworks enables you to link your existing 3D model with an existing construction schedule to add
new value. The ability to create a 4D simulation enables you to experience the construction process before it
begins.
In this exercise we will use a basic schedule in the MPX exchange format. This enables us to read the schedule
without the need for any scheduling software being installed.
1 Navigate to a clear view of the building.
2 Mouse-over the TimeLiner window and pin it open.
4D Construction Simulation | 21