Displaying Under Ground Piping in AutoCAD Plant 3D

One semi-frequent question is “how do I display underground piping on orthos?”

 

The easiest way in 2014 I have found consists of a few steps:

  • Use a box or plate to represent grade
  • Create one viewport for the below grade items
  • Create another viewport for above grade items
  • Overlay the viewports

Represent grade

In this model I used a box that has a height of 1/4” to represent grade.

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Create the Below Grade Viewport

For the below grade viewport, put the top of the view box at top of grade.

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Use the all hidden lines option.

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Use save ortho cube to easily come back to these settings.

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Generate the view and place the viewport. Add dimensions and annotation.

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Create Above Grade Viewport

Use the settings saved in the previous ortho cube.

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Set the bottom of the view box to top of grade and raise the top of the view box to show everything.

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Generate the view showing no hidden lines. Annotate and dimension the above ground viewport.

Overlay the viewports

Move the above ground viewport, annotations, and dimensions to align on top of the already annotated below ground viewport.  You want to do the annotation and dimensioning first, because when viewports overlay, AutoCAD may have trouble identifying which viewport you are trying to annotate in.

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