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Autodesk Subassembly Composer

The Autodesk® Subassembly Composer for Autodesk® Civil 3D® 2026 provides an interface for composing and modifying complex subassemblies, without a need for programming.

Topics in this section
  • Getting Started
    This section explains the features and the basics of setting up the Autodesk Subassembly Composer.
  • Common Workflows
    This section contains videos and workflow charts that describe common tasks that can be performed with the Autodesk Subassembly Composer.
  • Tool Reference
    This section describes the tools that are available in the Autodesk Subassembly Composer for Autodesk Civil 3D.
  • Entering or Calculating Property Data
    This section describes how to define geometry element properties by either entering or calculating values.

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