Civil 3D’s sample lines can calculate more than just surface related volumes. They can also calculate the structural volumes associated with a roadway design. The trick to extracting structural volumes is knowing the shape codes used by the parts in your assemblies.
Each closed shape within a subassembly part is “named” using a shape code. To extract the average end area volume of that shape, you can simply reference its code and Civil 3D will take care of the rest. All calculated volumes are then stored in a material list that will dynamically update if the corridor model changes.
If you are interested, I’ve created a video that walks through a workflow to compute multiple structural material volumes from a roadway corridor model.
-Jeff
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