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Calculate NEC-compliant conduit fill percentages or find the minimum conduit trade size for your conductor configuration. Supports all common wire types and conduit materials.
No. Precast duct bank installation is a surface operation. Sections are set from above using an excavator, and the dowel-pin system eliminates the need for workers to enter the trench for alignment. This removes the confined-space permit requirements, atmospheric monitoring, and rescue standby personnel that add cost and complexity to traditional cast-in-place installations.
Yes. The reduced embodied carbon, waste elimination, fewer truck trips, and EPD documentation all contribute to LEED, BREEAM, and other green building credit categories. For data center developers with corporate ESG commitments, our sustainability data integrates directly into Scope 3 emissions reporting. We can provide project-specific environmental impact summaries upon request.
Yes. Unlike cast-in-place duct banks that require 3–7 days of cure time before backfill, precast sections arrive fully cured and at design strength. You can backfill immediately after setting and inspecting. This means your trench opens and closes in the same shift, dramatically reducing safety exposure and site disruption.
Yes. Every project is custom-engineered to your specifications. We design each section based on your conduit layout, spacing requirements, bend radii, and routing. There is no catalog of fixed configurations — we build exactly what your project needs. Our engineering team delivers stamped calculations within 10–14 days of receiving your plans.
Absolutely. Many of our clients — particularly data center developers — have phased construction programs spanning months or years. We establish standing production agreements, maintain your project tooling, and schedule deliveries phase by phase. This approach locks in pricing, eliminates re-engineering on repeated configurations, and keeps lead times short across all phases.
No. Civil and general labor crews handle installation — the same crews already doing excavation and backfill on your project. This is a significant advantage because it frees your electrical contractors from low-value concrete work and lets them focus on terminations, testing, and energization. Most crews are productive after a single day of training.
Yes. We provide Environmental Product Declarations for our standard concrete mixes, documenting the full lifecycle environmental impact of our products. EPDs are increasingly required for green building certifications and are essential for data center developers tracking Scope 3 emissions and ESG compliance targets.
Yes. We serve projects across the entire United States. For projects near our Massillon, Ohio facility, we ship direct via truck or rail. For projects in other regions, we partner with qualified local precasters who manufacture to our exact specifications, tooling, and quality standards. This regional production model reduces freight costs while maintaining the consistency and quality you expect from Duct Bank One.
Yes. Our standard designs meet or exceed HL-93 highway loading requirements with a 25% design margin. We also design for E80 railroad loading and aircraft loading rated for 100,000+ pound wheel loads. All structural designs are backed by stamped engineering calculations from licensed professional engineers.
We are a manufacturer, not an installer. However, we provide comprehensive training and field support to ensure your crew installs efficiently from day one. This includes hands-on training at our Canton Training Facility or on your job site, a field technician present during your first installation, and ongoing remote support. Most crews are setting sections independently within their first day of training.
Sections are delivered on flatbed trucks, numbered and sequenced in your project’s installation order. We coordinate delivery schedules with your site team to align with your trench progression, and we offer flexible scheduling to accommodate changes in your construction timeline. Staging areas are planned during preconstruction to ensure efficient offloading and placement.
Contact our team at 330-583-6034 or Sales@DuctBankOne.com with your project details. We typically need plan sheets or conduit requirements to provide an initial estimate. From there, we assign a dedicated project contact, deliver stamped engineering calculations within 10–14 days, and can begin production within 4–6 weeks of contract. We guarantee a 24-hour communication turnaround on all inquiries.
Precast sections arrive with factory QC documentation including dimensional verification, concrete strength test results, and conduit alignment records. On site, inspectors verify section placement, joint alignment, and grade. Because the concrete is already cured and the conduits are factory-set, there are far fewer inspection failure points compared to cast-in-place installations where conduit shifting, insufficient cover, and pour quality are common issues.
Precast duct bank installation offers significant advantages over traditional cast-in-place (CIP) methods across three key areas:
Speed
CIP duct bank installation typically produces 80–120 linear feet over 2–3 days — accounting for excavation, conduit placement, forming, concrete pouring, curing, and backfill. Precast installation averages 300–450 linear feet per day, with excavation, setting, and backfill all completed the same day. Linear foot ranges vary based on duct bank depth and soil conditions.
Safety
CIP installation requires 6–12 workers in the trench at various stages, with the trench remaining open for 2 or more days. Precast installation requires as few as 1 person in the trench, and because sections arrive fully cured, the trench is backfilled the same day — dramatically reducing exposure time and risk.
Risk
CIP installations are prone to weather delays and dependent on large crew availability, making schedules unpredictable. Precast duct banks can be set in virtually all weather conditions with less than half the crew size, providing far greater schedule dependability for project managers and general contractors.
Precast duct bank production generates 20% less CO2 per cubic yard than the national average for cast-in-place concrete. Overall, precast duct banks have 15–25% lower embodied carbon than field-poured alternatives. This reduction comes from optimized mix designs, zero over-pour waste, reusable steel molds instead of disposable lumber forms, and the elimination of multiple ready-mix truck trips to the job site.
Precast duct banks reduce the number of workers in the trench by 80% or more — from 10–15 workers for cast-in-place to as few as 2–3 for precast installation. Our dowel-pin system eliminates hands-between-sections pinch points, and same-day backfill means shorter trench exposure times. There is no rebar tying, formwork assembly, or concrete pouring in the trench. Duct Bank One projects have reported zero in-trench work injuries.
Precast manufacturing produces virtually zero concrete waste because sections are poured into precision steel molds — there is no over-pour, no cutoff waste, and no disposable formwork. Traditional cast-in-place duct banks generate significant waste from lumber forms (used once and discarded), excess concrete from over-ordering, and rebar cutoffs. Our reusable molds eliminate the need for single-use lumber entirely.
Our direct purchase model allows project owners, developers, and general contractors to buy duct bank sections directly from us, bypassing the traditional layers of subcontractor markups. This typically saves 10–15% on underground material costs. The electrical contractor still handles terminations and testing, but the concrete duct bank scope shifts to the civil crew — a more natural fit that improves overall project efficiency.
Experienced crews install precast duct banks at a rate of 400–600 linear feet per day, compared to 50–200 linear feet per day with traditional cast-in-place methods. New crews typically set one section every 10–15 minutes during their first installation, improving to under 5 minutes per section with experience. Most projects see a 75% reduction in on-site construction time.
Standard sections range from 10 to 20 feet in length. The exact length is determined during engineering based on your project layout, transportation logistics, and crane/excavator capacity on site. Sections arrive numbered and sequenced for your specific installation order.
We deliver stamped engineering calculations within 10–14 days of receiving your project plans and specifications. This includes section designs, conduit layouts, structural calculations, and thermal resistivity data. Our dedicated engineering focus on duct banks means faster turnaround than firms juggling multiple product types.
Yes. Thermal resistivity is a critical factor in cable ampacity calculations, and we provide verified thermal resistivity data for our concrete mixes. This data helps electrical engineers confirm that cables within the duct bank will operate within their rated temperature limits, which is especially important for high-power data center and utility applications.
Our Massillon facility has direct rail access, and rail freight produces 75% fewer greenhouse gas emissions per ton-mile compared to trucking. A single precast delivery replaces 6–8 ready-mix concrete truck trips that would be needed for an equivalent cast-in-place installation. Our regional partner network further reduces freight distances by producing sections closer to your project site.
Our duct banks are designed and manufactured in compliance with applicable ACI (American Concrete Institute) standards, NEC (National Electrical Code) requirements for underground raceway systems, and project-specific structural requirements. We provide stamped engineering calculations and can accommodate any additional local code or specification requirements.
Our standard mix designs range from 4,000 to 10,000 psi compressive strength, depending on project requirements. All concrete is batched in-house at our Massillon facility using aggregates from our on-site quarry and cement from our on-site terminal, giving us complete control over quality and consistency. We do not rely on third-party ready-mix suppliers.
We manufacture duct bank sections in configurations ranging from 4-way up to 30-way, accommodating virtually any underground electrical or communications layout. Conduit types include PVC Schedule 40, PVC Schedule 80, HDPE, and fiberglass (RTRC). Each configuration is engineered to your project’s specific spacing, depth, and routing requirements — there are no off-the-shelf compromises.
The process follows nine steps: contract and kickoff, engineering and fabrication, training and preconstruction planning, trench preparation, delivery and staging, setting the duct bank sections, inspection and documentation, backfill, and on-site support. The key advantage is that engineering and fabrication happen in parallel with site preparation, so duct bank sections are ready when your trench is.
Installation requires a standard excavator for trench work and section placement — the same equipment already on most job sites. No specialized cranes, forms, or concrete pumping equipment are needed. The trench crew can be as small as one equipment operator and one laborer, compared to the 10–15 workers typically required for cast-in-place duct bank construction.
We maintain close communication with your team throughout the project and can accommodate layout revisions. Because our production is continuous rather than slot-scheduled, we have more flexibility to adjust section configurations, quantities, and delivery schedules than competitors who queue your project behind other product lines. Contact your dedicated project coordinator to discuss any changes.
We serve any project that requires underground electrical or communications infrastructure, including data centers, power generation facilities, healthcare campuses, industrial sites, higher education, government and military installations, commercial developments, airports, ports, substations, and utility yards. Data center campuses are one of our fastest-growing markets due to their aggressive construction timelines and need for reliable underground power distribution.
At minimum, we need your project plans or conduit configuration requirements (number of conduits, sizes, and general routing). Additional details that help us provide the most accurate estimate include load requirements, soil conditions, project timeline, and delivery location. Contact us at 330-583-6034 or Sales@DuctBankOne.com and we’ll walk you through what we need.
A precast duct bank is a factory-built concrete assembly with conduits already embedded in precise alignment. Instead of building duct banks in the field — which requires loose pipe, rebar, formwork, and poured concrete — precast sections arrive ready to set. Crews place them with an excavator, connect them using our patented dowel-pin system, and backfill, often completing an entire run in a single shift. The result is a stronger, more consistent product installed in a fraction of the time.
Our vertically integrated facility in Massillon was designed with sustainability in mind. The on-site aggregate quarry and cement terminal eliminate supplier trucking. Rail access reduces long-haul freight emissions by 75% compared to road transport. Our steel molds are reused thousands of times, and our concrete batching process is optimized to minimize waste and energy consumption. We continuously evaluate supplementary cementitious materials and mix design improvements to further reduce our carbon intensity.
Duct Bank One is the only manufacturer in the United States dedicated exclusively to precast concrete duct banks. Based in Massillon, Ohio, we design, engineer, manufacture, and deliver prefabricated duct bank sections for projects nationwide. Unlike other precasters who split production across vaults, manholes, and other products, 100% of our capacity is focused on duct banks — which means faster lead times, deeper expertise, and no scheduling conflicts with competing product lines.
RHO (thermal resistivity) is a critical factor in medium-voltage (MV) and high-voltage (HV) duct bank layout design. Engineers design duct bank systems around the RHO value of the concrete to ensure proper heat dissipation from energized cables.
Lower RHO values require a tighter mix design with lower water-cement ratios — this is where factory-produced precast has a significant advantage. Our precast duct banks use precision-mixed self-consolidating concrete (SCC) that delivers excellent flowability while maintaining the low water-cement ratios needed to meet demanding RHO specifications.
Precast duct banks are also held to extremely tight tolerances — conduit spacing is controlled to within .01 inches to meet fit-up requirements. This level of precision directly impacts the thermal performance of the system. Most cast-in-place (CIP) field installations would have a difficult time adhering to such tight tolerances, where shifting conduits and variable field conditions can compromise the designed RHO performance.
In short, factory precision in both concrete mixing and conduit placement ensures that the low-RHO designs specified by engineers are consistently met — something that is far harder to guarantee with field-poured concrete.
Our patented dowel-pin system uses 18-inch guide pins that automatically align adjacent sections as they’re set. The operator lowers a section and the pins guide it into position — no manual alignment, no hands between sections, no shimming. This hands-free connection eliminates pinch-point hazards, reduces the trench crew to as few as one operator and one laborer, and allows experienced crews to set a section in under 5 minutes.
Our standard lead time is 4–6 weeks from contract to first delivery. This compares to 8–20 weeks from competitors and 3–10 months during peak demand periods. We achieve this because 100% of our production capacity is dedicated to duct banks — we never get bumped by vaults, manholes, or other products competing for the same production line.
Our Massillon facility produces up to 320 sections per day, which translates to approximately 3,200 linear feet of duct bank daily. This capacity, combined with our regional partner network, allows us to handle large-scale projects — including hyperscale data center campuses — without the lead time spikes that affect shared-production precasters.
Our standard sections are designed to HL-93 (highway traffic loading) with a 25% design margin above the minimum requirement. We also engineer sections for E80 (railroad) loading and aircraft loading rated for 100,000+ pound wheel loads. Every design is backed by stamped engineering calculations specific to your project conditions.
Every section undergoes factory quality control inspection before it ships, including dimensional verification, conduit alignment checks, concrete strength testing, and visual inspection. Because we manufacture in a controlled indoor environment rather than an open job site, we eliminate variables like weather, inconsistent field labor, and shifting conduits that commonly affect cast-in-place installations.
We offer hands-on installation training at our Canton Training Facility, which features a real trench environment for realistic practice. We also provide on-site training at your project location before the first installation. A Duct Bank One field technician stays on site during your first installation until your crew is confident and independent. Ongoing remote support and refresher training are available for the life of your project.
Our headquarters and primary manufacturing facility are in Massillon, Ohio. The 200,000+ square foot facility includes an on-site aggregate quarry, cement terminal, rail access, and steel fabrication capabilities. For projects outside our direct shipping range, we partner with qualified regional precasters who produce to our exact specifications, tooling, and quality control standards — giving you local production with national consistency.
We work with general contractors, electrical contractors, civil contractors, and project owners or developers. Our direct purchase model allows owners and GCs to buy directly from us, eliminating unnecessary markup layers. Electrical contractors also benefit because precast shifts the concrete scope to civil crews, freeing electricians to focus on higher-value termination and testing work.
Color coding is an important safety and identification standard in the duct bank industry. Generally, red is used for medium-voltage (MV) electrical duct banks and orange for fiber optic and telecommunications lines.
Integral coloring has become the industry standard, replacing topical (surface-applied) coloring. The reason is practical: topical coloring applied after installation can get covered in dirt and mud over time, making the duct bank difficult to identify during future excavation. When a crew hits a topically colored duct bank years later, the surface color may no longer be visible as a warning.
Integral coloring solves this problem. Because the color is mixed throughout the entire concrete, even when chipping into or digging through the surface, the color remains visible — providing a clear warning sign to the operator that they are cutting into an active duct bank. This added layer of protection helps prevent accidental cable strikes during future utility work.
Duct Bank One offers integral color options to meet your project specifications and safety requirements.
All calculations are estimates only. Verify with a licensed engineer before construction. No guarantee of accuracy or code compliance. Conduit fill limits are based on NEC Table 1 (Chapter 9). Always consult the current edition of the National Electrical Code and applicable local amendments.