Modular and Prefabricated Data Halls in Oklahoma

Modules arrive on trucks, and the route decides what size they can be. A prefabricated data hall is built in a factory, tested there, and shipped to a pad that has been waiting for it. The promise is speed: the site work and the module fabrication run in parallel, and the hall is set in days instead of built in months. The risk is that the site is not ready when the module arrives, or that the module cannot reach the site.

We do the part that happens on the ground. That means the pad, the foundations or piers, the embedded plates, the underground electrical, the cooling water or refrigerant connections, the grounding and the crane work. We also coordinate with the module supplier on tolerances and on the sequence of connections, because a module set a few inches out of position costs far more than the same inches on a conventional slab.

Oklahoma owners choose prefabrication for several reasons, and the site decides which of them applies: to move quickly when power becomes available, to place capacity at an edge or remote site, or to add a hall to an existing campus without a long construction disruption.

The state has more than 2,600 miles of Class I rail, over 12,000 miles of highway and three interstates, and a water route as well. The McClellan-Kerr navigation system covers 445 miles of waterway and moves more than 4 million tons of cargo each year, and the Tulsa Port of Catoosa is among the largest inland ice-free river ports in the country. For oversized loads, those routes offer choices that a module supplier will ask about.

The last miles of delivery are rarely on the main routes. Rural bridges, utility lines and tight turns control module dimensions, and the supplier needs a route survey before shipping. We walk the route with the supplier and a heavy-haul carrier, and we report weight limits and clearances so the module is designed to fit. See Catoosa and the Port of Catoosa for the logistics of that corridor.

A module's performance depends on the foundation under it. We pour pads to the supplier's flatness and elevation tolerances, with embedded plates or anchor bolts located by survey, and we protect the pad until delivery. Settlement, drainage and frost depth are checked with the geotechnical engineer, and the pad is sized with room for service access and future modules.

Utilities are part of the same decision. Duct banks come up through the pad at the positions the module requires, and we set sleeves, stubs and grounding to the drawing. Mistakes here show up on delivery day, when a crane is on site and a truck is waiting. We prove the layout by survey before the pour, and we check it again after the forms are set, because a corrected form costs minutes while a corrected pad costs weeks. Owners who plan to add modules later should ask us to pour a second pad slab or leave a clear area with stubbed utilities, since a future module is much easier to place beside an existing one than in a yard that has filled with other equipment. Our mission-critical concrete slabs page describes the methods.

We start with the module supplier's installation manual and build our schedule backward from the delivery date. The sequence is: site approval, grading, pad and utilities, curing, delivery, crane set, interconnection, testing. We require written acceptance of the pad from the supplier before delivery, and a delivery plan that names the crane, the route and the weather limits.

On a campus, modules may be set next to live equipment. We separate the crane and rigging area from the live yard, set exclusion zones and coordinate with the operator. Owners adding halls over time can see our phased expansion build-outs approach for the larger picture.

Prefabrication shortens field labor and schedule, but it adds transportation, rigging and, in many cases, a premium for factory production. It also shifts cost forward: payments to the manufacturer come early, and any change after the factory starts is expensive. We help owners compare the module against a built-in-place alternative, with real site numbers rather than brochure figures.

Site conditions can change the comparison. A small site, such as a 15-acre industrial parcel three miles north of I-40 and bordered by a BNSF rail spur, as described in a state prospectus for Shawnee, favors a compact module layout. A site far from heavy haul routes may favor built-in-place construction. We explain which factors matter most for each project.

The critical date is the crane set. Everything before it is preparation, and everything after it is connection and testing. We build float into the preparation phase, because a late pad or an uncured foundation can force a module to wait on a truck, and detention costs add up quickly.

After the set, connections move fast if the stubs are right. Electrical and mechanical connections, controls integration and commissioning follow a planned order, which we align with the integrated systems commissioning plan.

We work statewide. Prefab halls suit places where a conventional build would take too long or where labor is scarce, such as small towns on the interstates and industrial parks with rail. The modular data center page describes typical configurations, and our telecom and network carriers page covers carriers who deploy modules across many sites.

Wherever the module goes, the first question is power and the second is the road. We ask both in the first call.

Send us the manufacturer, the delivery window and the site. We will plan the pad, the connections and the crane set so the module can go in on the day it arrives.

Do you supply the modules?

We build the site, the pad and the connections, and we coordinate with the manufacturer you choose. If you want us to help select a manufacturer, we can compare options against your site and schedule, but the module contract is normally between you and the supplier.

What should be finished before the module ships?

The pad should be poured, cured and surveyed. The underground electrical and cooling connections should be in place and tested, the utility service should be available or on a firm date, and the crane and route should be confirmed. We keep a pre-delivery checklist and sign it with the supplier.

Can modules be added next to an existing hall?

Yes, if the site has room and the utilities have capacity. We plan the new pad and tie-ins so construction work does not interrupt live systems, and any interconnection to energized gear is scheduled with the operator and performed under a written procedure.

Are modules treated as buildings by the permit office?

Often, yes, though practice varies by jurisdiction. Some offices review them as structures, others as equipment with a foundation permit. Ask the building department early, and ask whether the factory's third-party approvals will be accepted.

How much does weather affect set day?

Wind and lightning stop crane work. In Oklahoma, spring storms can delay a set by days, so we keep the crane available through a window rather than a single day. We also watch the forecast and decide before the truck leaves the factory.