Raised Access Floor for Server Rooms & Data Centres
Mtshali Power Electronics & Infrastructure supplies and installs raised access floor systems for server rooms and data centres across Durban, KwaZulu-Natal and nationally. We handle the full scope on site: slab inspection, grid layout, pedestal anchoring and levelling, panel laying, earthing and bonding, and final load verification.
Because we also install and maintain the UPS systems, battery banks and precision cooling that sit on that floor, the load planning is done by the people who know what the equipment actually weighs and where it has to go. Most flooring contractors install the floor and leave. We are still there when the UPS goes in, when the batteries are replaced five years later, and when the racks are added.
Based in Durban. On call 24/7 across KZN.
What Is a Raised Access Floor System?
A raised access floor is a modular platform of floor panels carried on adjustable steel pedestals above the concrete slab. The gap it creates, the void, becomes a managed service space beneath the working floor.
That void carries:
Structured data cabling
Electrical power reticulation to racks and PDUs
Cooling airflow, where the void is used as a supply plenum
Leak detection cable
Fire suppression pipework
Room for whatever gets added in three years time
The result is a server room where the infrastructure is accessible without ripping anything out, and where the cooling actually reaches the equipment it is supposed to cool.
It is also one of the few decisions in a server room build you cannot easily reverse. Once the racks are loaded and the UPS is live, replacing the floor means shutting down the room. Getting the panel grade, the void depth and the load planning right at design stage costs a fraction of fixing it later.
Why Raised Floor Specification Matters in Durban?
Durban is coastal. The air is humid and salt-laden, and that is not a cosmetic problem in a raised floor installation.
Untreated or lightly coated pedestals corrode at the base where they meet the slab, and corrosion at the pedestal head compromises the earth path that the whole antistatic system depends on. We specify galvanised steel pedestals as standard on all KZN coastal installations, and we check pedestal and stringer condition as part of routine server room inspections under our maintenance agreements.
The same applies to the void itself. A raised floor void in a coastal server room with marginal cooling becomes a condensation trap. Void depth, airflow and the position of the CRAC units have to be planned together, not bolted on afterwards.
This is the difference between a flooring supplier and a critical power contractor who happens to install floors.
Applications
Server rooms
Data centres
Network and comms rooms
Control rooms
Telecom facilities
Corporate IT environments
Any room where a UPS, battery bank or rack array sits on the floor
Panel Types and Technical Specification
We install to the standard 600mm x 600mm grid.
Steel encapsulated panels
The default for South African server rooms. A high-density core, either calcium sulphate or cement, fully encapsulated in a welded steel shell. Strong, dimensionally stable, and available across the full load range. Finished in antistatic vinyl or high-pressure laminate.
Perforated airflow panels
Where the void is used as a cooling plenum, perforated panels are placed in the cold aisle in front of the racks to deliver conditioned air directly to the equipment intakes. Open area is selected to match the airflow requirement. Damper options allow airflow to be balanced across the room after commissioning.
Adjustable galvanised pedestals
Height-adjustable, epoxy-bonded and mechanically anchored to the slab. Galvanised as standard on coastal installations.
Stringer systems
Bolted stringers tie the pedestal heads into a rigid grid. Specified where lateral stability matters: high void depths, heavy rolling loads, or seismic and vibration considerations.
Finishes
Antistatic (ESD) vinyl, earthed and bonded
High-pressure laminate (HPL)
Load and Structural Planning
This is where most raised floor installations fail, and it is the part flooring suppliers get wrong because they do not know what your equipment weighs.
A fully populated 42U rack can exceed 900kg. A three-phase UPS with an external battery cabinet can exceed 1,200kg concentrated over a small footprint. A pallet jack rolling a battery cabinet across the floor during installation imposes a rolling load the finished floor may never see again, but which will crack a panel on the day.
Standard 600mm x 600mm steel encapsulated panels carry a uniformly distributed load in the region of 600kg/m2 to 1,200kg/m2 depending on grade. Heavy-duty panels are specified where concentrated point loads land on the floor.
For every installation we calculate:
Uniform distributed load (UDL)
Concentrated point load, at the worst-case position on the panel
Rolling load, including the delivery and installation route
Void depth against cooling and cabling requirements
Pedestal spacing and stringer requirement
Equipment placement against the panel grid
Where a point load exceeds the panel rating, we do not compromise the panel. We plinth the equipment directly to the slab and build the floor around it. UPS plinths, battery cabinets and generator connection points are handled this way as standard.
Void Depth
There is no single correct answer. It depends on what the void is doing.
150mm to 300mm: cable management only, no underfloor air
400mm to 600mm: void used as a cooling supply plenum
Above 600mm: high-density racks, large air volumes, or where pipework and cabling share the void
Deeper is not automatically better. A void that is too deep for the air volume being pushed through it produces poor pressure distribution and cold spots. It is a calculation, not a preference.
Installation Process
Site measurement, slab inspection and moisture check
Layout marking and grid planning against the equipment plan
Pedestal anchoring, epoxy bonding and precision levelling
Stringer installation where specified
Panel placement, cutting and locking
Perforated tile placement in the cold aisle
Cable tray and containment installation in the void
Earthing and bonding for static control
Final level check and load verification
Handover with as-built layout
Earthing and bonding is carried out to SANS 10142-1. Our qualified registered electricians can issue a Certificate of Compliance for the associated electrical work.
Integration with the Rest of the Server Room
A raised floor is not a standalone product. It is the base layer of a system.
Cold air delivered from the void through perforated tiles into the cold aisle cools racks far more efficiently than room-level cooling alone. It reduces hot spots, extends the working life of the cooling plant and allows higher rack densities than a slab installation with the same cooling capacity. Without hot and cold aisle discipline, that hot exhaust air mixes back into the cold supply and the cooling system works harder than it needs to for the rest of its life.
The floor determines where the UPS can stand, where the battery cabinet can stand, where the cooling can reach and how the cabling gets there. It has to be designed with all of them, not before them.
We deliver raised flooring as part of complete server room builds covering UPS, batteries, precision cooling, structured cabling, monitoring and fire suppression, coordinated under a single scope and carried forward under a single service level agreement.
Frequently Asked Questions
How much does a raised access floor cost in Durban?
Cost is driven by panel grade, load rating, void depth, finish and floor area. We quote per square metre, supply and install, after a site inspection and slab check. Higher load ratings and deeper voids cost more, and it is cheaper to specify the correct grade upfront than to replace panels under a live UPS later.
What void depth do I need?
For cable management only, 150mm to 300mm is generally enough. Where the void is used as a cooling plenum for underfloor air distribution, 400mm to 600mm is typical. It is calculated against the air volume and the cabling, not chosen off a catalogue.
Can a raised floor carry a UPS and a battery cabinet?
Yes, with the correct panel grade and pedestal spacing. Where the concentrated point load exceeds the panel rating, the equipment is plinthed directly to the slab and the floor is built around it. Either way, it has to be planned before installation, not discovered afterwards.
Do I need antistatic flooring in a server room?
Yes. Electrostatic discharge damages IT equipment, often without immediate failure. Antistatic vinyl panels, properly earthed and bonded through the pedestal grid, are standard specification in any room holding live IT equipment.
Do you install raised floors outside Durban?
We are based in Durban and cover KwaZulu-Natal directly. We take on raised floor and full server room installations nationally.
Can you retrofit a raised floor into an existing server room?
Yes, but it requires planning around live equipment and usually a phased approach or a planned shutdown. Before any planned shutdown of a live UPS we assess lifecycle parts first, because equipment that has run continuously for years does not always come back cleanly from a cold restart.
Raised access floor supply, installation and load planning across Durban, KwaZulu-Natal and nationally.
For a site inspection, design consultation or quotation:
Mtshali Power Electronics & Infrastructure (Pty) Ltd
Durban, KwaZulu-Natal
031 100 2679 (24/7)
078 515 4731 (WhatsApp)
service@powerinfrastructure.co.za
