Construction Support
Duct Bank Design
Underground duct-bank layout and coordination. Geometry, materials, and routing that hold up to inspection and time.
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
A consistent process means predictable timelines, fewer surprises, and a defensible record if anyone (AHJ, insurance, OSHA) asks how the work was done.
- 01
Site survey
Coordination with civil for utilities, drainage, and structural conflicts.
- 02
Cross-section design
Duct count, material (PVC, fiberglass, steel), spacing, and burial depth set against ampacity needs and pull tension.
- 03
Manholes / pull boxes
Spacing and sizing per NEC and pull-tension calculations.
- 04
Ampacity verification
CYMCAP run on the as-designed geometry to confirm cable ratings.
- 05
CD package
PE-stamped plan, profile, and detail sheets with full specifications.
Stamped
100%
Every deliverable PE-stamped by a licensed engineer in the project state. Across all 24 registered states.
Response
1 day
We respond to every inquiry within one business day with a scoped proposal and a real timeline.
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
Ready to scope your duct bank design engagement?
Send us the basics (facility type, equipment, timeline) and we’ll respond with a scoped proposal within one business day.