Understanding Fire Door Ratings in New Zealand
The fire rating of a door in New Zealand depends on the fire cell and the wall rating where it will be installed, based on the building’s usage, application, and compliance requirements.
A Fire Engineer’s report specifies the required fire rating for each door, ensuring the building meets the New Zealand Building Code and NZS 4520:2010 standards.
What Is a Fire Door Rating?
A fire door rating refers to how long a door can resist fire, heat, and smoke under test conditions. Fire doors are essential safety features that slow the spread of flames, protect escape routes, and give occupants time to evacuate safely.
In New Zealand, the most common fire door ratings are 30-minute and 60-minute systems. Each system must undergo stringent independent testing to meet NZS 4520:2010 requirements.
30-Minute Fire Doors
Commonly installed in:
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Apartment entry doors
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Hotel room entries
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Corridors and hallways
These doors withstand fire for at least 30 minutes, giving occupants sufficient time to evacuate safely via designated exit routes.
Key Benefits:
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Lightweight and practical for residential and commercial applications
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Contains smoke and fire within specific fire cells
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Complies with safety standards for multi-unit buildings
60-Minute Fire Doors
Typically required for:
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Electrical cupboards
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Service rooms and plant areas
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Stairwells and escape routes
Installed in high-traffic and critical safety zones, these doors resist flames and heat for up to one hour, ensuring that elderly occupants and people with mobility needs can evacuate safely during an emergency.
Key benefits:
- Enhanced fire protection for essential escape routes
- Meets stricter compliance standards for safety-critical areas
- Protects property and life by delaying fire spread
Compliance and Testing Standards in New Zealand
All fire-rated doors must meet the New Zealand Standard NZS 4520:2010 and relevant sections of the NZ Building Code (C/AS2–C/AS7). Each fire door system – whether 30-minute or 60-minute – must pass independent laboratory testing to confirm performance and compliance.
Your Fire Engineer’s report will specify the exact fire rating and installation details required for each door, based on your building’s design and intended use.
Key Takeaways
- Fire door ratings (30 min or 60 min) depend on the fire cell and wall rating.
- The Fire Engineer’s report defines which rating your project requires.
- All fire doors must comply with NZS 4520:2010 and the NZ Building Code.
- 30-minute doors are used for general access areas like apartments and hotels.
60-minute doors are used in high-risk zones like stairwells and service areas.