How is a data center designed architecturally?
How is a data center different from an ordinary building?
In an office building, most of the space is for people; in a data center, most of it is taken up by server racks, UPS units, batteries, transformers, generators and cooling systems. The building's job is to protect, cool and power this equipment and allow it to be maintained. That is why the architect works with the electrical, mechanical and structural teams from the first sketch. For the engineering side, see the article on the difference between Tier III and Tier IV on the Sönmez Mühendislik blog (in Turkish).
Spaces and architectural criteria
| Space | Function | Architectural criterion |
|---|---|---|
| White space (data hall) | The hall housing the server racks | A column grid that does not interrupt rack rows; high floor loading; no windows; dust and humidity control |
| Electrical spaces | Transformer, switchgear, UPS and battery rooms | Redundant systems in separate fire compartments; heavy loads; short cable routes |
| Mechanical spaces | Chillers, pumps, air handling units | Room for outdoor units on the roof or in a plant yard; vibration and noise control |
| Generator and fuel area | Backup power generation | Exhaust, air intake and discharge, fuel delivery access, noise impact on neighbours |
| Loading and staging area | Where equipment is received, unpacked and prepared | Truck docking; goods lift; a wide, tall, step-free route all the way to the hall |
| Operations center and offices | Where the facility is monitored and managed | Workspaces with daylight; a security zone separate from the data hall |
| Security and entrance | Visitor and staff control | Layered access; single-person entry booths; vehicle checkpoint |
Security layers
Security in a data center is built in concentric rings like the layers of an onion: the plot boundary and perimeter fence, vehicle control, the building entrance, the operations zone, the data hall and finally the rack. Each ring is open to fewer people than the one before. The architectural plan makes these rings concrete through the layout of corridors, doors and partitions, and keeps visitor and equipment routes apart. From outside, a plain, closed façade that does not reveal what the building contains is preferred.
Section decisions: floor height and slab
- Floor-to-floor height: a raised floor or overhead distribution, racks, cable trays, hot and cold air paths and the fire suppression system stack up on top of each other. Data halls need a floor height well above that of an ordinary office.
- Floor loading: loaded racks and batteries are very heavy, and the structure is designed for this. See the article on floor loading and structural design in data centers (in Turkish).
- Roof: cooling equipment needs a reinforced roof with maintenance walkways and flawless waterproofing; there should be no wet rooms or water pipes above the data hall.
Modular and phased growth
Data centers are often brought into service phase by phase as demand grows, not all at once. The architectural plan treats each data hall, together with its own electrical and mechanical spaces, as a repeating module. That way, while the first phase is running, the second can be built and commissioned without stopping the live system. The site plan reserves space for future blocks, the generator yard and the transformer area from the start.
Common mistakes
- Not planning the route for equipment to enter the building and be replaced later.
- Putting redundant systems in the same room or fire compartment.
- Setting the floor height without calculating the service layers.
- Filling the plot without leaving room for growth.
- Running water pipes over or through the data hall.