Industrial Flooring and Hardstanding: Designing for What Runs On It

The floor is the hardest-working element

On most industrial buildings the slab takes more punishment than anything else, and it is the hardest element to repair because repairing it means stopping operations.

It is also the element most often designed generically, from an area and a notional load, rather than from what will actually run on it.

What the design needs to know

Most of these come from operations rather than from the design team, which is why a floor cannot be designed properly from a building brief alone.

Joints are where floors fail

Joint layout should be planned with the racking, not independently of it. A joint passing beneath a rack leg concentrates a point load on the weakest part of the floor.

Three things determine joint performance:

• Position — away from concentrated loads where possible
• Load transfer across the joint, so the two panels act together under a wheel
• Sealing, to keep debris out and protect the arris from spalling

Joint arrises take repeated wheel impact for the building's life, so this is where good detailing and good workmanship show.

Concrete practice is governed by IS 456:2000 with structural provisions in NBC 2016, Part 6; screed materials by EN 13813 where a topping is used.

Flatness is an operational requirement

For a floor with pedestrian traffic and low-level handling, a general tolerance is adequate.

For high-level racking with reach trucks or turret trucks, it is not. Small deviations amplify into significant mast sway at height, which slows operations and creates risk. Where that equipment will be used, the flatness requirement should be stated explicitly, because it affects how the slab is laid rather than being something to correct afterwards.

Surface finish follows exposure

State the conditions before selecting a system:

A system chosen without stating the exposure is chosen on price, which is how industrial floors get resurfaced within a few years.

External hardstanding

Different problem, different design: heavier concentrated vehicle loads, weather and thermal exposure, braking and turning forces at loading docks, and drainage falls that actually work.

Sub-base design depends on ground conditions, and the surface may be concrete, paving blocks to IS 15658, or a bituminous construction depending on the duty. Docks and turning areas usually warrant a heavier construction than the general yard.

Curing is not a formality

Inadequate curing produces a weaker, more permeable surface that dusts, wears and cracks more — and no later treatment fully recovers it.

It also sets when a finish can be applied, which makes it a programme constraint. Compressing it to hit a date is one of the most commonly regretted decisions on an industrial project.

Standards referenced

Plain and reinforced concrete practice in IS 456:2000; structural provisions in NBC 2016, Part 6; precast concrete paving blocks in IS 15658; screed materials in EN 13813. Slab design, loading, joint layout, flatness class and surface system for a specific facility must be established by the project's structural engineer and flooring specialist.