It Takes 5 People to Install a Precast Duct Bank and That’s the Whole Point

Cast-in-place duct banks typically put 10 to 15 people in and around the trench. Most of them are waiting on each other. The electricians are waiting on the pour. The pour crew is waiting on inspection. The superintendent is watching hours burn.

A DBO precast install runs with 5 people — and they dig, set, and backfill in a single shift.

That crew difference is where the margin lives. Here’s exactly who’s on it and why the structure works.

The 5-Person DBO Install Crew

1. Excavator Operator — digs and sets

This is the key position. One operator runs the machine that opens the trench and places the precast sections. They don’t need to be an electrician. They need to be a skilled equipment operator — someone who can lower a section to within 18 inches of grade and let the dowel pins do the rest. The pins handle alignment. The operator handles production.

2. Front End Loader with Forks — feeds the excavator

While the excavator is setting a section, the front end loader is staging the next one. No waiting. No gaps. The loader keeps the excavator in rhythm — pick, set, pick, set — without crew crowding the trench.

3. Backfill Machine — closes the trench

A second excavator or dozer follows behind, pushing clean fill back into the trench. Same-day backfill is the rule, not the exception. Once the sections are in and the joints are sealed, the hole closes immediately.

4. Laborer (in trench) — guides and unhoooks

One laborer works at the joint to guide sections together, confirm the dowel pins are seated, and release the lift rigging once the piece is set. This is not a highly specialized role. It doesn’t require a journeyman card. It requires someone who knows the process — which is exactly what DBO’s training is designed to produce.

5. Laborer (outside trench) — hooks up product

The second laborer works at grade, connecting rigging to the next section before the loader moves it into position. They keep the line moving and keep the operator productive.

Where the Labor Math Changes

On a cast-in-place duct bank, you might have a certified union electrician in that trench — at $70 an hour or more — tying conduit and managing the pour. That’s a skilled tradesperson doing work that doesn’t require their license. With precast, that trench role goes to a laborer at a fraction of the cost. The electrician goes back to terminating, wiring gear, and energizing systems — the work their rate is actually justified by. That’s not taking scope away from the EC. That’s putting their highest-value people on their highest-value work.

The Incentive That Creates Real Efficiency

Here’s something you won’t hear from most equipment suppliers: the crew structure isn’t just cheaper — it’s incentivizable in ways a cast-in-place crew isn’t.

Because the work is mechanical and repeatable, you can pay the install team on a per-day piece-rate basis. Set more sections, earn more. Trained DBO crews regularly run 300 or more feet in a day when that incentive structure is in place and the workers make strong money doing it. The incentive doesn’t just protect the schedule. It beats it. That’s a labor model cast-in-place can’t replicate. You can’t pay a crew more to make concrete cure faster.

Training Is What Makes It Work

A 5-person crew running this efficiently doesn’t happen on day one by accident. It happens because DBO’s training program at our Training Facility or on-site before first mobilization — eliminates the learning curve before the trench opens.

Most first-time operators set sections in 10–15 minutes. After a week on the job, trained crews routinely hit sub-5 minutes. The process becomes mechanical before it becomes production.

That’s what GCs mean when they say their team “figured it out by Tuesday.”

The Bottom Line

Five people. One shift. Trench open in the morning, backfilled by end of shift.

That’s not a marketing claim — it’s the production model DBO was built around. When you replace manual conduit work with engineered precast and mechanical alignment, the crew shrinks, the schedule compresses, and the margin moves in the right direction.

If you want to see how that crew structure fits your next duct bank scope, talk to our team or book time at the Canton Training Facility.

That’s how we build.