What are the fire safety requirements for an industrial building?

Fire safety requirements for an industrial building are determined by national building codes, European standards, and the building’s specific use, size, and fire compartment layout. In practice, this means every industrial building must achieve a minimum level of passive fire protection — including fire-rated walls, floors, and doors — to contain fire spread and allow safe evacuation. The sections below cover the key questions any facilities manager, architect, or project manager needs to answer before specifying or installing fire protection in an industrial facility.

Which fire resistance class is required for an industrial building?

The required fire resistance class for an industrial building depends on the building’s occupancy type, the size of its fire compartments, and the applicable national building regulations. There is no single fixed classification that applies universally — the correct classification for a given project must be determined through a project-specific fire safety calculation carried out by a qualified fire safety engineer or confirmed with the local authority.

The classification system used across Europe follows EN 13501-2, which rates building elements — including doors — on their ability to maintain integrity (E), limit radiant heat transfer (W), and provide insulation (I1 or I2) under fire conditions for a defined period. For industrial doors in the Netherlands, the relevant classifications include:

• EW60: The Dutch standard baseline for industrial fire doors — the door blocks flames and hot gases and limits radiant heat transfer for 60 minutes. W is the Dutch baseline criterion and is the starting point for most industrial applications.
• EI2-60: A common and fully valid alternative to EW60 — the door blocks flames and hot gases and limits temperature rise on the unexposed side (less strict insulation criterion) for 60 minutes.
• EI1-60 / EI1-120: The stricter insulation criterion — temperature rise on the unexposed side is limited to a lower threshold. Required when a higher level of thermal protection is specified.
• EW90, EW120, EW240: Higher EW classifications for more demanding compartmentalisation requirements.
• EI2-90, EI2-120: Higher insulation classifications (less strict criterion) for applications where longer fire resistance duration is required.

It is important to always distinguish between EI1 and EI2 — these are not interchangeable. EI1 applies a stricter temperature limit on the unexposed side; EI2 permits a higher temperature rise. Never specify “EI” without the suffix. Whether EW or EI (and which EI) is required for a specific building depends on the compartmentalisation calculation for that project — not on a general rule. The BBL (Besluit Bouwwerken Leefomgeving) sets only the absolute minimum requirement; a heavier classification may be required due to a project deviation from standard building regulations, a sector-specific regulation such as PGS15 for chemical storage, a client requirement, or an insurer requirement. Consult a qualified fire safety engineer or contact Metacon-Next directly to determine what applies to your project.

What is a fire compartment and why does it matter for compliance?

A fire compartment is a defined section of a building enclosed by fire-resistant construction — walls, floors, ceilings, and doors — designed to contain a fire within its boundaries for a specified period. Fire compartmentation is the foundation of passive fire protection: it limits fire and smoke spread, protects evacuation routes, and reduces structural damage to the rest of the building.

For compliance purposes, compartmentation matters because national building codes set maximum permitted compartment sizes for industrial buildings. In the Netherlands, the BBL (Besluit Bouwwerken Leefomgeving) defines maximum compartment areas for industrial functions and sets the absolute minimum fire resistance requirements. Exceeding permitted compartment dimensions without a compliant compartmentalisation strategy — verified through a project-specific fire safety calculation — means the building is non-compliant, regardless of how well individual elements perform. Where a larger compartment is required, equivalence must be demonstrated in accordance with the applicable standards; this is a complex process that depends on the specific building and should be assessed by a qualified fire safety engineer.

Every opening in a compartment boundary — including doors, windows, and service penetrations — must achieve the same fire resistance rating as the surrounding construction. A fire-rated wall with an unrated door is not a compliant compartment. This is why the specification of fire-rated industrial doors is inseparable from the broader compartmentation strategy: the weakest element defines the performance of the whole boundary.

What are the fire safety requirements for doors in an industrial building?

Fire doors in an industrial building must match the fire resistance classification of the compartment boundary they are installed in, be tested and classified under EN 1634-1, and carry a valid CE marking with a Declaration of Performance. For industrial fire doors, two CE-relevant standards apply simultaneously: EN 16034 (fire- and smoke-resisting closing elements) and EN 13241 (industrial, commercial, and garage doors generally). Both are mandatory and must not be treated as interchangeable or alternatives to one another.

The fire resistance classification of the door — expressed as EW or EI1 or EI2 plus a time value — must be determined by the compartmentalisation requirement for the specific project. The Dutch standard baseline is EW60, but EI2-60 and higher classifications are common and fully valid depending on the application. Always specify EI1 or EI2 explicitly; never use “EI” alone without the suffix.

Beyond classification, several additional requirements apply to fire doors in industrial settings:

• Self-closing or automatic release: Fire doors must close automatically on detection of fire, either through a self-closing mechanism or an electromechanical release linked to the fire alarm system
• Correct installation: A door’s tested performance is only valid when installed in accordance with the manufacturer’s installation instructions and within the tested boundary conditions — including the wall type, lintel construction, and fixings
• Smoke control: In many applications, doors must also provide smoke control, tested under EN 1634-3 and classified per EN 13501-2, in addition to fire resistance
• Size within tested limits: The door must fall within the maximum dimensions covered by the test certificate; larger openings require extended application rules under EN 15269 or a separate classification

Industrial openings are often large — sometimes several metres wide and tall — which rules out standard door products that have only been tested within smaller size ranges. Metacon-Next manufactures fire-rated industrial doors in roller curtain, roller door, compact roller door, overhead door, sliding door, and pedestrian door configurations, tested under EN 1634-1 and available in a range of EW and EI1/EI2 classifications — including for openings that exceed standard product dimensions. All CE certificates, Efectis classification reports, and EPD documentation are publicly available, which simplifies the verification process during permitting and inspection.

How does building size affect fire protection obligations?

Larger industrial buildings face stricter fire protection obligations because the potential consequences of fire — in terms of life safety, structural loss, and spread to adjacent properties — increase with scale. National building codes use compartment size thresholds to determine which fire resistance class applies, and buildings above certain floor areas or heights are subject to additional requirements such as sprinkler systems, smoke exhaust installations, or higher-rated compartment boundaries.

In practical terms, the fire resistance classification required for a given building — whether EW60, EI2-60, EI1-60, or a higher classification — is not determined by a fixed rule but by the project-specific compartmentalisation calculation. A heavier classification than the BBL minimum may be required because the project deviates from standard building regulations, because a sector-specific regulation such as PGS15 applies, because the client or principal sets a stricter requirement, or because the insurer mandates it. Insurers often impose requirements that go beyond the statutory minimum, particularly for buildings with high stock values or hazardous processes.

The interaction between compartment size, fire resistance classification, and suppression systems is not always straightforward. Some building codes allow a higher maximum compartment area if sprinklers are installed, effectively trading one form of protection for another. This is a decision that needs to be made at the design stage, in consultation with a qualified fire safety engineer, and documented in the building permit application. Changing the compartmentation strategy after construction begins is costly and often impractical.

What documentation do you need to prove fire safety compliance?

To prove fire safety compliance for an industrial building, you need a complete documentation package covering the building design, the installed products, and the installation process. At minimum, this includes the fire safety design report, the building permit with approved drawings, CE Declarations of Performance for all fire-rated products, EN 1634-1 test certificates and Efectis classification reports for fire doors, and as-built installation records signed off by the installing contractor.

For fire-rated doors specifically, the documentation chain must be unbroken:

1. Test certificate (EN 1634-1): Confirms the product was tested and achieved the stated fire resistance classification per EN 13501-2
2. Classification report (Efectis): Issued by an accredited notified body; specifies the exact product configuration, size limits, and installation conditions under which the classification is valid — including any extended application rules under EN 15269
3. Declaration of Performance (DoP): The manufacturer’s formal declaration that the product meets the stated performance, required for CE marking under both EN 16034 and EN 13241
4. Installation record: Confirms the door was installed in accordance with the manufacturer’s instructions and within the tested parameters
5. Maintenance log: Many building regulations and insurers require evidence of ongoing maintenance to keep the fire door in operational condition

A common compliance failure occurs when a product is correctly certified but the installation deviates from the tested conditions — for example, a different wall substrate, an oversized opening, or missing components. In that case, the classification is no longer valid even if the door itself carries a CE mark. This is why working with a manufacturer that provides complete, accessible documentation is not a minor convenience — it is a risk management decision.

Metacon-Next publishes all CE certificates, Efectis classification reports, and EPD documentation publicly on its website, removing the need to request documentation through a dealer or wait for a sales contact to respond. For architects and project managers specifying products for permitting, this transparency directly reduces the risk of a compliance gap being discovered during inspection. To discuss a specific project or request technical documentation, visit the Metacon-Next contact page or request a quotation directly through the website.

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