Understanding the Different Structures of Data Centers

Data Centers play a critical role in modern digital infrastructure, supporting the rapid expansion of cloud computing, AI technologies, and global data storage. The structural system of a data center must align with the technical complexity of the equipment housed within and the need for unwavering operational reliability. Layouts must support efficient airflow, cable management, and mechanical integration, all while maintaining high structural performance and durability.

This article explores the structural systems commonly used in modern data center construction and outlines key design considerations drawn from gbc engineers’ experience across Europe and Southeast Asia.

What is data center structural design?

Data center structural design is the engineering discipline that defines the load-bearing systems, floor slabs, columns, walls, and foundations of a data center facility. It must address the unique combination of heavy concentrated loads from IT and MEP equipment, large column-free spans, seismic and wind resistance, and the need for fast, modular construction delivery.

Structural requirements of a data center

Data Centers impose distinct structural demands that set them apart from conventional commercial buildings:

• Server rack loads: Standard IT rack design loads: 10–20 kN per rack position (including rack self-weight and IT equipment). High-density liquid-cooled GPU racks may require 20–35 kN or more, and the exact design load should always be checked against the current OEM datasheet and project-specific liquid-cooling configuration.
• Backup power systems: Diesel generators: typically 8,000–30,000 kg depending on rating (500 kVA–4,000 kVA+). Modular UPS systems: 500–5,000 kg per module. Large battery rooms may impose area loads of 10–25 kN/m².
• Cooling installations: Chillers (200–1,500 kN per unit), cooling towers, CRAH units, and liquid cooling distribution systems require careful structural integration on rooftops and mechanical floors.
• Cable management and ducts: Overhead cable trays, large MEP ductwork, and pipe networks impose distributed suspended loads of 1–5 kN/m² on floor slabs and roof structures.
• Large unobstructed spans: Column grids of 8–12 m in both directions are standard to provide open data hall floors supporting flexible rack arrangement and future reconfigurations.

Construction speed is a critical commercial driver. Structural systems enabling parallel off-site prefabrication and minimizing on-site wet trades are strongly preferred. Prefabricated precast concrete systems have emerged as the most favorable solution for modern data center construction, offering superior structural performance, factory-controlled quality, and significantly reduced on-site construction times.

Additionally, the 2026 data center market continues to see growing adoption of modular and prefabricated data center approaches — containerized modules (ISO container-based or purpose-built skid-mounted enclosures) deployed within shell-and-core buildings or as standalone outdoor units. These modular formats can reduce time-to-operation dramatically when procurement, utility, and permitting conditions allow.

Read more: Typical Data Center Layout: Core Components and Infrastructure 2026

Typical structural solutions

Floor slab systems

The floor slab system is one of the most critical structural choices in data center design, directly influencing load capacity, construction speed, MEP integration flexibility, and total floor-to-floor height. The four slab systems below represent the most commonly evaluated options:

 

Cast-in-situ reinforced concrete slab

A fully reinforced concrete slab poured and cured on-site using traditional or jump formwork.

• Advantages: Maximum design flexibility; excellent monolithic behavior and stiffness continuity; adaptable to complex geometries, local thickening for point loads, and any MEP penetration requirement.
• Limitations: Slowest construction option; high labor intensity; extensive formwork; quality dependent on site conditions and weather; minimum 28-day concrete curing cycle before full load application.

Filigree (semi-precast) slab

A hybrid system where thin precast concrete lattice elements with integrated bottom reinforcement act as permanent formwork, completed with an in-situ concrete structural topping.

• Advantages: Faster than fully cast-in-situ due to elimination of most conventional formwork; good surface finish from factory production; integrated lattice reinforcement simplifies on-site work; composite structural behavior after topping cures.
• Limitations: In-situ concrete topping still required; joint detailing between elements is critical; moderate improvement in construction speed vs. cast-in-situ; topping curing time still limits subsequent construction activities.

Hollow-core precast prestressed slab

Fully precast, prestressed concrete elements with longitudinal internal voids reducing self-weight while maintaining structural performance.

• Advantages: Fast installation (no wet work required at slab level); factory-controlled quality and consistent surface finish; spans of 8–14 m for typical data center distributed loads.
• Limitations: MEP penetrations must be pre-planned (core-drilling of hollow-core slabs post-installation requires engineering approval and limits locations); not optimal for very high concentrated point loads without secondary steel support; fire resistance detailing requires attention at bearings and joints.

Read more:  Precast Hollow Core Slabs for Data Centers

Double-T (TT) precast prestressed slab

Precast concrete elements with a double-T cross-section providing high load capacity over long spans.

 

• Advantages: Excellent load-bearing capacity for spans of 15–24 m; suited to repetitive modular data center bay layouts; eliminates secondary beam requirements for standard loading conditions.
• Limitations: Heavy elements (20–80 tonnes per element) requiring large-capacity cranes (50–200t rated); transportation constraints limit maximum element dimensions; MEP penetrations require pre-coordination with precast fabricator.

Beam systems

Beam systems transfer slab loads to vertical elements (columns or walls). Key selection factors include span length, floor-to-floor height constraints, MEP integration requirements, and the need for future flexibility. For large spans or high-load areas in data centers, prestressed or full-depth precast beams minimize deflection and accelerate construction. Where MEP coordination is complex, semi-prefabricated (composite) beams providing a soffit void for services may be preferred.

Beam depth optimization is critical: excessive beam depth reduces the clear height available for overhead MEP services within the structural zone. Coordination between structural beam depths and MEP duct runs is a primary interface to resolve early in the design development stage.

Column systems

Columns in data centers are predominantly prefabricated precast concrete elements, providing construction speed, dimensional precision, and factory quality assurance.

• Pendular columns (slab-to-slab): Columns span from one floor slab to the next, with beams bearing on corbels or column caps at each level. Simplifies erection sequence and allows beam placement flexibility. Requires careful connection detailing at each floor level to ensure structural continuity.
• Multi-story columns with corbels: Columns extend through multiple floor levels with beams supported on integrated corbels cast as part of the column. Reduces the number of column splices and improves vertical load transfer efficiency. Standard column shoe connections at the footing base (e.g., Peikko HPKM® system) enable fast, accurate, and moment-resistant column-to-foundation connections.

Column grid coordination with IT room bay layouts is essential. Standard data center column spacings of 8.4 m, 9.6 m, 10.8 m, or 12 m in both directions accommodate modular rack row arrangements based on 1.2 m rack depth and standard aisle widths (1.2 m cold aisle, 1.5–1.8 m hot aisle).

Wall systems

 Structural walls serve dual functions: vertical load-bearing and lateral resistance (wind and seismic). Three wall systems are commonly used:

Wall type	Construction speed	Flexibility	Best application
Cast-in-situ RC wall	Slowest	Highest (complex shapes, any penetration)	Complex geometry; high seismic zones
Hollow (semi-precast) wall	Moderate	Good (pre-planned openings)	European standard; good thermal/acoustic performance
Full precast wall panel	Fastest	Limited (pre-planned only)	Repetitive geometries; fast-track projects

 

For seismically active regions (Southeast Asia, Southern Europe), cast-in-situ or hollow semi-precast walls are generally preferred for lateral force-resisting elements (shear walls), as they provide monolithic behavior with better ductility than fully precast systems under cyclic seismic loading. Fully precast wall panels are better suited to regions with low seismic hazard or where lateral forces are primarily wind-governed.

Foundation systems

Foundation design is governed by geotechnical conditions. In Southeast Asia, where many major data center markets (Singapore, Jakarta, Bangkok, Ho Chi Minh City) are located on soft alluvial soils, deep piled foundations are typically required:

• Driven precast concrete piles: Cost-effective for medium loads; readily available in SEA markets; predictable installation quality
• Bored (CFA) piles: Preferred in urban areas with vibration and noise constraints; suitable for variable soil profiles
• Micropiles: Used for constrained access, retrofits, or where obstructions prevent conventional piling

Strict differential settlement limits must be specified for data center foundations. Raised floor pedestal systems typically tolerate maximum differential settlements of 5–10 mm between adjacent pedestal positions. IT equipment manufacturer specifications should be consulted for applicable tilt and settlement tolerances.

For competent soil sites (common in northern and central Europe), shallow spread footings or raft slabs are appropriate. Casting column base connections (Peikko BOLDA® or equivalent column shoe systems) as a monolithic element with the pad footing reduces construction time and ensures accurate column alignment.

Read more: When Should You Schedule a Structural Foundation Inspection?

 

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Conclusion

The structural design of data centers requires careful, project-specific integration of technical, logistical, and operational requirements. Heavy equipment loads, large open spans, flexibility for future expansion, seismic and wind resilience, and fast construction timelines are the defining parameters for structural system selection.

Prefabricated and semi-prefabricated precast concrete systems are particularly well-suited to modern data center construction, offering the combination of speed, factory quality, and structural performance that today’s competitive market demands. In seismically active markets across Southeast Asia and Southern Europe, structural system selection must also account for the capacity design requirements of applicable seismic standards.

At gbc engineers, we provide multidisciplinary structural engineering services for data center projects across Europe and Southeast Asia — from structural concept development and system selection through detailed design, BIM coordination, and construction support.

Frequently asked questions

What is the best structural system for a data center?

There is no single ‘best’ structural system — the optimal solution depends on project-specific parameters including location (seismic hazard, soil conditions), building geometry, column grid layout, construction schedule requirements, local material availability, and budget.

Precast concrete systems are generally preferred for new data center construction due to their combination of speed, quality, and structural performance. The structural concept should be developed by qualified structural engineers in close collaboration with the project’s architect, MEP engineers, and precast manufacturers.

How much load can a data center floor support?

Standard data center floor slabs are typically designed for distributed live loads of 10–15 kN/m², with concentrated point load capacity of 10–20 kN per rack position for standard IT equipment. High-density liquid-cooled AI/GPU racks may require concentrated design loads of 20–35 kN or higher, and that figure must be verified against the actual rack, coolant distribution unit, and support frame selected for the project.

Why is precast concrete preferred for data center construction?

Precast concrete is preferred because it combines fast on-site installation (factory-produced elements are delivered ready to erect), high and consistent quality (factory production eliminates weather-dependent quality variations), and structural performance suited to data center loading requirements. Precast systems reduce on-site labor and wet trades, accelerating the construction program and reducing time-to-operational, which is a critical commercial KPI for data center developers.

 

About us gbc engineers is an international engineering consultancy with offices in Germany, Poland, and Vietnam, having delivered 10,000+ projects worldwide. We provide services in structural engineering, data center design, infrastructure and bridge engineering, BIM & Scan-to-BIM, and construction management. Combining German engineering quality with international expertise, we achieve sustainable, safe, and efficient solutions for our clients.