About Creating Custom Subassemblies

Learn how to create subassemblies that meet your specific design requirements.

The Autodesk Subassembly Composer for Autodesk Civil 3D is installed with Autodesk Civil 3D 2019. It provides an interface for composing and modifying complex subassemblies, without a need for programming.

For more information, see the Autodesk Subassembly Composer Help.

Subassembly developers can compose complex subassemblies visually, using a powerful yet easy-to-use interface: