If you have ever felt constrained by the standard tool palettes in AutoCAD Civil 3D, you are not alone. Out-of-the-box subassemblies (like LaneSuperelevationAOR or BasicSideSlopeDitch) are excellent for generic projects, but real-world civil engineering requires custom logic. This is where Subassembly Composer (SAC) becomes your most powerful ally.
| Chapter | Title | Key Topics | |---------|-------|-------------| | 1 | Introduction | What is SAC? Why use it? Difference from stock subassemblies. | | 2 | Interface Overview | Toolbox, Workspace, Properties, Preview pane. | | 3 | Basic Workflow | Create new PKT → Define inputs → Build geometry → Test → Export to Civil 3D. | | 4 | Parameters | Input, Output, Target parameters (Surface, Offset, Slope). | | 5 | Visual Basic Script | Simple math, conditional logic (If/Then), variables. | | 6 | Geometry Construction | Point, Link, Shape creation. Sequences and loops. | | 7 | Conditional Subassemblies | Decision making (Pavement structure vs. trench). | | 8 | Advanced Targets | Lane widening, daylight to multiple surfaces. | | 9 | Superelevation & Cant | Applying superelevation to custom lanes/shoulders. | | 10 | Event Viewer & Debugging | Validating PKT, common errors. | | 11 | Testing in Civil 3D | Import PKT, assembly creation, corridor preview. | | 12 | Real-World Examples | Urban curb & gutter, rural ditch, retaining wall. | Subassembly Composer Autocad Civil 3d Tutorial Pdf
What is Subassembly Composer?
Real-World Practice Tips and Tricks (Jowenn Lua): This Autodesk University handout covers creating and managing subassemblies, focusing on customized code set styles for client requirements. Filename: Subassembly_Composer_Civil3D_Tutorial_v1