Monolithic concrete floor for industrial and warehouse floors

A monolithic concrete floor is a concrete floor that is poured in a single operation and immediately finished by machine, so that the structural slab and the wearing surface form one whole. With steel fibres — typically 25 to 35 kg per m³ — the laying of reinforcement mesh is eliminated and larger floor bays with fewer joints become feasible. That makes the monolithically poured, fibre reinforced floor the standard solution for industrial and warehouse floors.

What is a monolithic floor?

Monolithic literally means: made from one piece. With a monolithic floor, pouring, compacting, levelling and machine finishing (power floating) are carried out in one continuous operation. No separate screed or finishing layer is applied on top: the poured concrete ís the finished floor. How that power floating works in detail and which finish levels are possible is covered in our article on the power-floated concrete floor.

The key characteristics of a monolithic floor:

• Flatness — machine power floated, suitable for racking and internal transport; higher flatness classes are achievable with laser screed equipment.

• Wear resistance — the top layer is densified during power floating, producing a dense, hard-wearing surface without any additional coating.

• One material, one operation — no bonding problems between structural slab and wearing layer, and a shorter construction time than a floor with a separate finishing layer.

• Directly reinforceable with fibres — because the floor is poured in one go, the concrete plant mixes the reinforcement (steel or synthetic fibres) through the mix in advance.

Within the knowledge centre on fibre reinforced concrete, the industrial floor is by far the most common application — and not without reason, as becomes clear below.

The loading on an industrial concrete floor

An industrial floor in a distribution centre, assembly hall or warehouse has to cope with three kinds of loading at once: point loads from racking legs (with tall pallet racking quickly several tonnes per leg), dynamic loading from forklift trucks with hard wheels, and frequent temperature fluctuations from incoming and outgoing transport, for example at dock doors or cold stores.

This combination makes industrial floors susceptible to precisely the failure mechanisms that fibre reinforcement protects against: cracking from shrinkage and loading, spalling of edges at joints, and surface wear. Moreover, a crack or damaged joint edge in a logistics floor is not a cosmetic problem: forklift wheels hammer every defect further apart, driving up maintenance costs and damaging equipment.

Why use fibres in a monolithic industrial floor?

Stronger corners and edges. In traditionally reinforced floors, the edge of a floor bay — for example at a joint transition — is a known weak point: because of the required concrete cover, the reinforcement mesh sits just where the load does not act. Fibres are distributed homogeneously throughout the entire concrete volume, right into corners and edges, which demonstrably limits spalling from forklift traffic.

More durable surface. Fibres control surface micro-cracking and limit spalling, so the surface stays intact for longer. The ultimate wear resistance of the top layer is determined mainly by the concrete quality and the finish (densifying and polishing); fibres are a complement to that, not a substitute.

Fewer joints. Because fibres control shrinkage cracking throughout the whole floor bay, larger bays can be poured with fewer sawn joints — every joint that is eliminated is one less maintenance point and one less bump for internal transport.

Faster construction. Fixing and aligning reinforcement mesh on a large floor quickly takes several working days; fibres arrive ready-mixed from the concrete truck. How much time and money that saves is calculated in fibre concrete versus reinforcement mesh.

For heavily loaded floors, steel fibres for heavily loaded industrial floors such as the MPWG HT+ 60/0.75 are the first choice: hooked-end high-tensile fibres that qualify as structural reinforcement in accordance with EN 14889-1 and whose residual strength is tested to EN 14651.

Floor thickness and fibre dosage per load class

The right combination of floor thickness and fibre dosage always follows from a calculation, which also takes the bearing capacity of the subbase into account. As an indication, the following practical values apply to monolithic industrial floors on a well-compacted subbase:

• Light storage and pedestrian traffic — floor thickness approx. 120–150 mm; steel fibre approx. 20–25 kg/m³ or structural synthetic fibre approx. 2–4 kg/m³.

• Forklift traffic up to approx. 2.5 tonnes — floor thickness approx. 150–180 mm; steel fibre approx. 25–30 kg/m³.

• Heavy forklifts and pallet racking — floor thickness approx. 180–220 mm; steel fibre approx. 30–35 kg/m³, with localised additional reinforcement under heavily loaded racking legs.

• Heavy transport and external yards — floor thickness approx. 200–250 mm; dosage and fibre type based on a structural calculation.

These values are indicative; the usual bandwidth for steel fibre concrete lies between 25 and 50 kg/m³. Why the thickness depends so strongly on subbase and loading is explained in how thick should a concrete floor be; the dosing methodology per fibre type is set out in our practical dosing guidelines. With the calculator you can work out the quantity of fibres needed for your floor area straight away.

Joints or jointless: the movement joint in a concrete floor

Two types of joint occur in a concrete floor, and the distinction is essential for the design:

• Contraction joint (sawn joint) — sawn within about 24 hours of pouring, it forces the inevitable shrinkage crack into a straight, controllable line. Without fibres, bays are typically sawn at around 5 to 6 metres.

• Movement joint — a continuous joint that structurally separates floor bays from each other and from columns, walls and pad foundations, so the floor can move freely under shrinkage and temperature differences. These joints remain necessary in a fibre floor at transitions and around penetrations.

This is where fibre reinforcement makes the biggest practical difference: because steel fibres absorb the shrinkage stresses throughout the whole bay, sawn-joint spacings can be increased considerably. In practice, with higher steel fibre dosages, even jointless floor bays of up to around 40 by 40 metres are achieved — provided the design, the mix and the curing are geared to it. Fewer joints means less joint maintenance, less vibration in internal transport and less damage to forklift wheels.

What does a monolithic floor cost? Price per m²

The price of a monolithic, power-floated industrial floor depends on the floor thickness, the fibre dosage, the floor area (delivery and pouring capacity weigh heavily on small floors) and the required flatness class. As an indication, 2026 price level and depending on the project:

• Monolithic industrial floor, poured and power floated — approx. €45 to €90 per m², including concrete and finishing, excluding foundations and groundworks.

• Surcharge for steel fibre reinforcement — at a dosage of 25–30 kg/m³, roughly a few euros up to €45 per m³ of concrete, depending on fibre type and steel price; for a 180 mm thick floor that works out at in the order of €1 to €8 per m².

• Savings — set against that is the elimination of purchasing, transporting and laying reinforcement mesh, plus a shorter construction time.

On balance, a fibre floor for industrial applications is almost always cheaper in total construction cost than the same floor with mesh. A complete cost breakdown with worked examples can be found in steel fibre concrete: price, dosage and applications; for a project-specific price, request a quotation.

Which fibre type for which floor?

• Heavy industrial floors with intensive forklift traffic or tall racking — steel fibre offers the highest residual strength and wear resistance; the hooked-end MPWG HT+ 60/0.75 is our heaviest-duty fibre for this (dosage 10–35 kg/m³, depending on the calculation).

• Floors exposed to moisture or chemicals, such as in the food industry or the agricultural sector — structural synthetic fibre eliminates any risk of surface corrosion; TwistR fibres for industrial floors are dosed at 2 to 6 kg/m³.

• Any monolithic floor that must be finished to a high standard — micro fibres for a sleek surface finish such as Promicro (0.6–1.0 kg/m³) prevent plastic shrinkage cracks in the first hours after pouring and produce a denser surface; they are often combined with steel or macro fibres.

• Corrosion-free reinforcement in aggressive environments — basalt fibre combines high tensile strength with corrosion resistance and heat resistance up to around 700 °C.

Note: micro fibres provide no structural residual strength and therefore do not replace reinforcement mesh; steel or macro fibres are needed for that.

From drawing to poured floor

When pouring an industrial floor, little changes in the process itself with fibres: the concrete plant mixes the fibres through the mix in advance, after which pouring, compacting and power floating proceed as with any monolithic floor. Dosage, mixing and curing do deserve attention, however — a properly executed pouring plan is part of the design for larger, low-joint bays.

For very heavy point loads, such as tall racking systems, a calculation by the structural engineer remains necessary. Fibres do not fully replace traditional reinforcement in every situation; under heavily loaded racking legs, fibre reinforcement is often combined with locally placed additional reinforcement. That such a conversion can be done quickly is proven by the project at the NDSM wharf in Amsterdam: there, a complete design was converted from steel reinforcement to fibre reinforcement within two days — including approval from the municipality — with a net saving of 1,500 kg of reinforcing steel and a 98% CO₂ reduction on the reinforcement component as the result.

Unsure between fibre types or dosages for your floor? Run your project through the calculator or submit your floor build-up to us via a quotation request — we work alongside you from the first drawing.