🌾 Irrigation Canal Design Civil 3D Part 4 | Canal Subassembly & Corridor Setup**

🌿 Irrigation Canal Design in Civil 3D – Part-4: Subassembly and Daylight Setup

In this post, we continue our canal design journey in Civil 3D by focusing on creating a subassembly using a polyline. A well-defined subassembly is crucial for accurate corridor modeling and cut/fill analysis.

Original CIVIL 3D file Download link

Canal Subassembly creation for the corridor

📌 Step-by-Step Workflow:

Open Profile View where the canal alignment is visible.

Draw a polyline across the canal section (trapezoidal or custom shape).

Assign Daylight Generic Links:

Cut Slope

Fill Slope

These define how the canal side slopes connect to the ground.

Convert this section to a Subassembly (if using Subassembly Composer or directly within Civil 3D with assembly setup).

Prepare for corridor modeling, which we’ll cover in the next part.

🔧 Benefits of Custom Subassembly:

Flexibility to match project-specific canal sections

Better control over cut/fill daylighting

Accurate volume calculations during corridor and section analysis

📺 Watch the full video tutorial embedded here

👉 Stay tuned for Part-5, where we create corridors, sample lines, and cross-sections.