Duct Bank

Duct Bank arranges the conduits in a preferred area into a proper underground duct bank — a grid of conduits held at set horizontal and vertical spacing, like the cross-section of a concrete-encased duct bank. It’s the underground counterpart of Conduit Stacking.

It’s available when you’re routing Underground, and it works on a Preferred Area.

Here’s the full walkthrough:

The steps are broken down below.