A data hall is only as available as the buildings that feed it. The electrical room, the generator yard, the chiller plant, the fuel storage and the security gatehouse are what keep the servers running when the grid blinks, and each one has its own construction requirements. These support buildings are smaller than the data hall, but they carry the uptime promise, and a mistake in a switchgear room or a generator pad shows up on the first load test.
We build the support buildings for data campuses and for the smaller edge and enterprise facilities that sit beside them. The typical package includes a main electrical building housing medium-voltage switchgear, UPS rooms and battery rooms; a generator yard with pads, fuel systems and paralleling gear; a mechanical plant with chillers, pumps and cooling towers or dry coolers; a security gatehouse with vehicle screening; and an operations and loading building where hardware is received, staged and tested.
We write for owners in the data center sector and their design teams who have already chosen a tier and a topology. Our work starts where theirs does: converting a one-line diagram and a mechanical schematic into foundations, structures and enclosures that can be built, inspected and energized. Where the owner also wants the main data halls built, we link the work to our data center construction service.
Build sequence and tolerance control
Support buildings are heavy. Switchgear lineups, transformers and battery systems put concentrated loads on slabs, and generators and chillers produce vibration. We sequence the work so that foundations are formed to the equipment vendor's cut sheets, with embedded plates and conduit stubs surveyed and recorded before concrete. A conduit stub that lands a few inches off its switchgear opening becomes a field fix inside an energized-adjacent room, so we set stubs from the vendor drawing and check them with a total station.
We also separate construction from commissioning. Once a room is closed in and its cooling is working, it is cleaned to a standard that suits electrical gear, and access is controlled. Dust is the enemy of switchgear, and we use sticky mats, negative pressure and daily cleaning in the weeks between enclosure and energization. We maintain a turnover binder for each room and pass it to the commissioning agent in the order it will be tested, following the discipline in commissioning and turnover.
The buildings and what is in them
For a full data center campus, the electrical building is a precast, tilt-wall or steel-framed structure with raised slab, cable trench or underfloor conduit, rated walls, fire suppression and redundant HVAC. The generator yard is a set of concrete pads with fuel piping, containment, bollards and a fence. The chiller plant adds structural steel supports for piping and equipment, drainage for blowdown and condensate, and noise treatment. Underground work ties them together; our electrical duct banks and concrete-encased conduit are placed and inspected before any building is closed in.
Security structures complete the package. Gatehouses, vehicle barriers, perimeter fencing and camera masts are designed with the owner's security consultant, and we integrate them with the site electrical and data systems. That work extends our fencing and security integration scope, but for data facilities the rating of the barriers and the lighting levels follow the owner's security standard.
Lead times and energization
The schedule is built around long-lead electrical equipment. Medium-voltage switchgear, transformers, generators and UPS systems can have lead times of many months, and the building must be ready to receive them when they ship. We build a delivery calendar tied to building readiness: roof on, slab cured, temporary cooling on, access path cleared. If gear arrives early, it needs conditioned storage, and we price that option rather than assume.
Utility interconnection is the other critical path. The utility's study, design and construction of the service can set the energization date regardless of how fast the buildings go up. Platteville, where the Fort St. Vrain station operates as a combined-cycle plant of roughly 965 MW, is one corridor where large generation already sits; owners siting a support-heavy campus near Platteville ask early about the interconnect rather than late.
Codes, foundations and the energy requirement
Local jurisdictions set the code. Unincorporated Weld County adopted the 2024 International Building Code effective June 15, 2026, with engineered foundation designs required for most new structures, so a support building there needs a stamped foundation from day one. Incorporated cities nearby may be on different editions, which we confirm before the drawings are issued. Colorado HB22-1362 also pushes any jurisdiction updating its code on or after July 1, 2023 to adopt an energy code at least as stringent as the 2021 IECC, which affects envelope and lighting in support spaces.
Fire protection is specific to the use. Battery rooms need ventilation and hazard-specific detection, generator fuel systems need spill containment and shutoff, and switchgear rooms use clean-agent or preaction systems depending on the owner's risk policy. We coordinate with the fire marshal at the pre-application stage so those choices are accepted before drawings are final.
Working near energized and critical systems
Data campuses are built in phases, and construction often continues next to energized equipment. We plan with the owner's electrical safety program: lockout and tagout, arc-flash boundaries, qualified-person assignments and permit-to-work systems. Cranes setting transformers and generators work under written lift plans, with spotters and exclusion zones, and equipment deliveries use designated routes.
Security clearances and escorted access are routine. Every crew on site carries credentials issued by the owner's security office, and our superintendents control tool and material entry. Hot work is permitted under a fire watch system, and we plan outages as scheduled events with a back-out plan. The result is a site where the safety and uptime systems are treated as the same discipline.
Build the plant behind the data hall
Share the one-line diagram, the equipment list and your target energization date. We will return a building-by-building scope, a delivery calendar and the interface list for utilities and commissioning.
Common Questions
Do you build the data hall or only the support buildings?
We can do either or both. Many owners package the support buildings separately so the electrical and mechanical plant can start before the hall design is final. When the owner wants the hall as well, we coordinate both under one team so the interfaces are designed once.
What controls the energization date?
Usually the utility interconnect and the long-lead electrical equipment. The buildings must be ready to receive gear when it ships, and the utility must deliver service on schedule. We track both on a combined critical path and report on them weekly.
How do you control dust in electrical rooms?
We enclose the room early, maintain positive pressure and temporary cooling, require clean-room-style entry practice, and clean daily. Before energization, the commissioning agent verifies cleanliness. Dust in switchgear creates failures that appear months after turnover.
Does altitude affect the equipment?
Yes. Above roughly 3,300 feet, many electrical and cooling products require derating, and Colorado sites exceed that. We ask the vendors for altitude-adjusted ratings and carry them into the design documents so the equipment is not under-capacity at the site.
What foundation approach applies in Weld County?
Unincorporated Weld County now requires engineered foundation designs for most new structures. We commission a geotechnical report, size the foundation for the equipment loads and use the stamped design in the permit set. Heavy equipment pads follow the equipment vendor's tolerance sheets.