Understanding Assembly Insertions

To create a corridor, Civil 3D inserts instances of an assembly along a 3D chain at regular intervals. These assembly insertions can be thought of as the ribs of the 3D model, providing shape to the road one assembly at a time (see Figure 9.3).

Figure 9.3  Assemblies inserted at intervals along a 3D chain.

Because the assembly insertions are dynamically linked to the 3D chain, any change to the alignment or profile will prompt a change in the corridor. The assembly insertions are also dynamically linked to the assembly itself, so any change to the assembly will also prompt an update to the corridor.

Understanding Corridors

• Understanding the 3D Chain
• Understanding the Assembly
• Understanding Assembly Insertions
• Understanding Corridor Feature Lines
• Understanding the Corridor Surface