How does a good structural engineer reduce the risks of a data center project?

Finland has established its position as one of Northern Europe’s most attractive regions for digital infrastructure. The cool climate, stable power grid and seismically safe ground conditions attract international technology giants to invest in large-scale data center projects. When a new data center is set to be built, attention often first turns to energy efficiency, cooling solutions and fiber-optic connections. However, the financial and operational success of the entire project is often based on a less visible but even more critical factor: professional structural design.

In the design of demanding projects such as data centers and other industrial and infrastructure structures, even small calculation errors or non-optimized solutions can multiply into significant additional costs or delays on site. Structural design is comprehensive risk management, where technical solutions are aligned with the budget, tight schedule and smooth construction execution.

High-quality and practical design makes structures safe to erect, easy to implement and efficient in terms of material use. Proactive design and the right structural solutions protect the investment and significantly streamline the construction phase.

Heavy equipment loads and vibration control: Designing foundations and intermediate floors

A modern data center contains exceptionally heavy technical equipment. Tall server racks, massive liquid cooling units, backup power systems and battery systems create concentrated and dynamic loads that are not typically encountered in standard commercial or office buildings. If the load-bearing capacity of intermediate floors and foundations has not been calculated and optimized precisely, the result may be deflection or microcracking in concrete structures. This can put expensive equipment at risk and lead to serious operational disruptions.

One of the key issues to address is vibration damping. Cooling compressors and backup generators create continuous mechanical vibration. Without proper structural isolation, these vibrations travel through the frame and can interfere with sensitive fiber-optic connections or shorten the service life of hard drives. This is why careful structural design of industrial buildings and infrastructure structures is essential. In this process, dynamic loads are analyzed accurately and the structures are stiffened in accordance with the requirements.

Structural design makes it possible to stop these vibrations at the source. In practice, this is achieved by designing separate equipment plinths isolated from the rest of the frame with movement joints, and by optimizing the mass and stiffness of the concrete structures. This enables expensive and sensitive servers to operate without disruption.

Flexibility and long spans: The benefits of post-tensioned concrete structures

The pace of development in digital infrastructure is exceptionally fast. Today’s data center capacity may require completely different equipment solutions ten years from now, with traditional air-cooling systems potentially being replaced by heavier liquid cooling solutions or extremely dense server clusters required for AI computing. For a data center to retain its commercial value and usability far into the future, the building frame must be flexible and adaptable.

A dense column grid is a significant obstacle to the efficient use of equipment halls and to the routing of cable trays or large ventilation ducts. Long spans are therefore essential. Long spans can be achieved efficiently by using post-tensioned concrete structures. These make it possible to implement thinner and lighter intermediate floor slabs with exceptionally high load-bearing capacity without massive intermediate columns.

Thinner slabs give building services designers more room to place massive cable trays, busbars and cooling pipelines. In addition, open and unobstructed space makes installation work easier on site, which speeds up project delivery and reduces clashes between the work phases of different contractors. When there are fewer vertical structures, the space can adapt flexibly to future needs without expensive and heavy renovation work.

Construction speed and site-friendly design: How design shortens delivery time

The demand for cloud services and high computing capacity has compressed data center construction schedules from years to just a few months. In this tight time window, smooth site operations are critical. When the structural engineer works in a site-friendly way, a significant amount of time is saved. Site-friendly design focuses on concrete structures that are easy to install without complicated work phases or waiting times.

Accurate and real-time building information modeling (BIM) plays a key role here. When all parts of the load-bearing frame, large building services pipe routes and busbars are coordinated in a digital three-dimensional model already at the design desk, costly mistakes can be avoided during installation. For example, if a ventilation duct and a load-bearing concrete beam were to clash in the same location, discovering the mistake on site would stop work for days. High-quality design eliminates these situations in advance, allowing installations to proceed in a straightforward way without unnecessary chipping or patching.

Physical safety and risk management: Watertightness and fire resistance

A data center must operate without interruption every second of the year. According to expert estimates in the industry, even a short outage can cause significant financial losses and serious reputational damage to a company. The structures must therefore provide maximum protection against external threats. The most important protective factors are complete watertightness and fire safety.

Modern data centers use large amounts of water and other liquids to cool equipment. In addition to internal pipework, external moisture or rising groundwater also pose risks to expensive servers. In design, these risks are managed by using watertight concrete grades and by designing joints and penetrations to be fully watertight. A properly dimensioned concrete structure acts as a protective barrier in itself, preventing moisture from entering critical equipment rooms.

The non-combustibility of concrete and its ability to withstand high temperatures effectively prevent fire from spreading from one compartment to another. Precise fire ratings and sufficient concrete cover for reinforcement, defined during the design phase, ensure that the frame maintains its load-bearing capacity even in exceptional fire situations. The design protects valuable technology and ensures the stability of the frame during a fire.

Proactive design secures the investment

A large data center construction project is a complex whole in which different design disciplines must work closely together. A skilled structural engineer is a key person in the project, aligning strict safety requirements, a fast construction schedule and financial constraints. By investing in high-quality and site-friendly design, the client avoids costly change work, makes everyday work easier for contractors and receives a flexible building that serves its purpose for decades.