Subassembly Composer is a utility that comes with AutoCAD Civil 3D, which enables users to create custom subassemblies for use in corridor design. A subassembly is a collection of components that work together to form a part of a corridor, such as a road, highway, or railway. Subassembly Composer allows users to create custom subassemblies by defining the components, their relationships, and their behaviors.
Subassembly Composer saves configurations as a compiled . To transition your completed file into production within AutoCAD Civil 3D, execute the following steps:
: Autodesk University (AU) often provides free handouts in PDF format after classes like CI3435 or CI2289 – search the AU website for past course materials.
Create points and connect them with links to form the ditch's shape.
Every subassembly starts at an automatic origin point called (Coordinates 0,0,0). In Civil 3D, P1 represents the attachment point where the subassembly connects to the corridor assembly baseline. Adding Points and Links
Which it needs to track (e.g., surfaces, alignments, profiles)
Paste these elements into a word processor (such as Microsoft Word or Google Docs).
Once you save your file (.pkt extension), you import it into Civil 3D. It appears in your Tool Palette just like any other subassembly, ready to be used in your assembly.
Click inside the green shape properties box, then click inside the closed polygon within your Preview Window. SAC will automatically select L1, L2, L3, L4 to form S1 . 5. Coding and Target Parameters
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This is the central workspace where you drag, drop, and connect functional blocks (Points, Links, Shapes, and Decisions) to establish the logical build order of the subassembly.
Where you define the subassembly's name and its Input/Output Parameters , such as lane width or depth. 2. Core Geometry Building Blocks Subassemblies are built from three fundamental elements:
