Why is this interesting? It becomes interesting when you are adding Civil 3D into the mix. Civil 3D has the abilities to create 3D solids. This has been difficult for civil 3D for a long time. This has been made easier with the introduction of the sub assembly composer.
For example: let’s take a tunnel. part 1,2 and 3 are created from different assemblies.
- Import the dwg file with manual origin.
- Place it anywhere
- Move the dwg file and put the marker on top of the intersection of the two reference planes
- goto a front view and check the vertical full alignment
- Fully explode the dwg
Notice that the dwg is a freeform. This is the only way to get a freeform in Revit. There is no way to create a freeform with native revit commands. Notice the amount of draghandles?
- Startup a revit project
- go to level 0 or it’s equivalent in your template
- turn on the project base point
- enter the coordinates you have used in civil 3D. Don’t forget to turn them into mm
- Load the family in the project and place the family in the right position
- Create generic model schedule (new in 2014) and see the volume
- Create a section over the model
It’s my experience that the section doesn’t always work. This has been logged with Autodesk and they are looking into the matter.