Construction Support

Duct Bank Design

Underground duct-bank layout and coordination. Geometry, materials, and routing that hold up to inspection and time.

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Overview

A duct bank is a one-time install with a fifty-year service life. The geometry decided in the design phase governs ampacity, mutual heating, and how easy it is to pull replacement cable in ten years. We design encased duct banks for substations, data centers, and large commercial campuses with proper duct spacing, bend radii, manhole and pull-box placement, and integrated ampacity calculation via CYMCAP.

What's included

Scope of work

Routing study and right-of-way coordination

Duct bank cross-section design (size, spacing, encasement)

Manhole and pull-box sizing and placement per NEC 314 / 110

Concrete encasement and reinforcement details

Integrated CYMCAP ampacity check

Stamped construction documents

Methodology

How the engagement runs

We agree on inputs, responsibilities, and deliverables before the work begins, then keep the design decisions connected through each stage.

Duct Bank Design: how the engagement runs

  1. 1Site survey
    Coordination with civil for utilities, drainage, and structural conflicts.
  2. 2Cross-section design
    Duct count, material (PVC, fiberglass, steel), spacing, and burial depth set against ampacity needs and pull tension.
  3. 3Manholes / pull boxes
    Spacing and sizing per NEC and pull-tension calculations.
  4. 4Ampacity verification
    CYMCAP run on the as-designed geometry to confirm cable ratings.
  5. 5CD package
    PE-stamped plan, profile, and detail sheets with full specifications.

Engineering scope

Project-specific

Disciplines, deliverables, licensing, and sealing requirements confirmed for your project before work begins.

Response

1 day

We respond to every inquiry within one business day to discuss scope, next steps, and the information needed for a proposal.

Veteran-owned

VOSB / SDVOSB

SAM.gov registered. UEI H6HAZKAD4LJ7 · CAGE 08E02. Set-aside eligible.

When you need it

Triggers

  • →Substation feeder build
  • →Data center utility entrance
  • →Campus medium-voltage loop expansion
  • →Municipal feeder relocation

What you receive

Deliverables

  • PE-stamped duct bank construction documents
  • CYMCAP ampacity report
  • Material and quantity takeoffs
  • Manhole and pull-box schedules

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