Mezzanine platform - how do you double your storage space?
A mezzanine platform uses the height your building already has to add a second level without extending the shell. This guide explains how to size load capacity and structure to EN 1993, plan the build, and handle fire protection and permits.
View storage systemsHow does a mezzanine double your storage space?
A mezzanine platform is a free-standing steel structure that carries a second level on columns above the floor. In a typical 5 to 6 m high hall this turns one footprint into almost twice the usable area - without extending the building or relocating.
The space under the platform stays fully usable for racking, picking or workstations. Above it you store lighter, slow-moving goods or set up office and welfare areas. Capacity rises while rent and plot size stay the same.
- Below: shelving, pallet racking or packing stations.
- Above: light small parts, archive, seasonal stock or office level.
- Access via staircase, goods lift or pallet gate.
- Modular, extendable and removable when you relocate.
What load capacity and structure does it need?
Load capacity is the central design criterion. It is given as an area load in kg/m² and must match the intended use. The steel structure is designed to EN 1993 (Eurocode 3), while the imposed loads follow EN 1991‑1‑1.
Besides the area load, point loads (for example a fully loaded pallet truck), beam deflection and the permissible pressure of the columns on the floor slab all matter. A structural calculation by a qualified engineer is practically always required for walk-on mezzanines.
- Define the area load in kg/m² clearly against the use.
- Account for point loads and traffic loads such as trucks.
- Check the ground pressure under the columns.
- Structural proof to Eurocode 3 by a qualified engineer.
What about fire protection and permits?
A mezzanine changes the usable area and often the occupancy of a building, which usually makes it subject to a building permit. The relevant building regulations and industrial building rules apply; with an added level, escape routes, stairs and fire resistance have to be reassessed.
Fire protection depends on size, use and number of people. Small open platforms without occupied rooms often count as equipment, whereas larger or enclosed levels require a fire-resistance rating (for example R30/R90) for columns and deck plus properly designed escape and rescue routes.
- Anti-slip floor panels (at least R9) and edge protection with railings.
- Toe board (kick plate) against falling objects.
- Lighting and emergency lighting on the upper level.
- Secure the pallet transfer point with a safety gate or flap.
Frequently asked questions
Does a mezzanine need a building permit?
Usually yes. Because it changes the usable area and typically the occupancy, building regulations almost always require a permit. Clarify your specific case with the building authority early.
What load capacity should a mezzanine have?
It depends on use: light archive around 250‑350 kg/m², normal shelf storage 350‑500 kg/m², heavy storage up to 1000 kg/m². A structural calculation to Eurocode 3 sets the binding values.
How much building height do I need?
Sensible from around 4.2 m clear height so that roughly 2.1 m of headroom remains below and above. At 5 to 6 m you can almost double the floor area.
Can I move a mezzanine later?
Yes. Mezzanines are bolted steel modules that can be dismantled, extended and rebuilt elsewhere. Structure and permit must be reassessed at the new site.
Planning a mezzanine for your hall?
We help with sizing, load capacity and fire protection and supply the right storage equipment for the space below and above.
Code-compliant
Designed to EN 1993 with structural proof.
Space gained
Up to double the floor area without extending.
Permit handled
Support with the application and fire protection.
Expert advice
Specialists plan load capacity and access.