Core Interface Components

Autodesk Subassembly Composer (SAC) is a standalone application that allows Civil 3D users to create complex, parametric subassemblies without manual programming. It is primarily used when standard out-of-the-box subassemblies cannot meet specific corridor design requirements, such as unique road cross-sections, tunnels, or retaining walls.

Introduction

Define two input parameters:

Which option do you want?

Sequence

Drag a from the Toolbox onto the flowchart. Inside it, you will place the geometry creation steps.

Q: "How do I get multiple shapes (e.g., lanes and sidewalks) to have different materials?"

Benefits of Using the Subassembly Composer

Title:

Civil 3D Subassembly Composer Tutorial Subtitle: Build Custom Corridors Without Programming Target Audience: Civil 3D users (road, rail, site design) Prerequisites: Basic Civil 3D corridor knowledge Software Version: Civil 3D 2024–2026 & SAC 2024–2026

Finding high-quality Civil 3D Subassembly Composer (SAC) tutorials often means digging through Autodesk University (AU)