When it comes to fire safety in Australian buildings, doors are only part of the equation. The frame that supports them plays an equally critical role. Fire-rated metal door frames are a key component of compliant fire-resistant doorsets, helping maintain structural integrity and prevent the spread of fire and smoke during an emergency.
For builders, strata managers, and project supervisors in Sydney, understanding how these frames work and how they should be installed is essential for safety, compliance, and long-term performance.
This guide explains what fire-rated metal frames are, how they differ from non-rated options, and what you need to consider before installation.
What Are Fire-Rated Metal Door Frames?
Fire-rated metal door frames are steel frames specifically designed and tested to support fire-resistant doors. They form part of a complete doorset that has been assessed under Australian Standards to withstand fire for a specified time.
Unlike standard frames, these frames are manufactured from steel of suitable gauge and installed using tested fixing methods to ensure the door performs as intended during a fire event.
They are commonly required in:
- Fire-isolated stairwells
- Exit corridors
- Lift lobbies
- Plant rooms and service risers
- Multi-residential and commercial buildings
When paired with compliant fire-rated doors, they help compartmentalise fire and protect escape routes.
Why Metal Frames Are Used for Fire-Rated Applications
Metal frames are preferred for fire-resistant installations due to their strength, stability, and predictable performance under heat. Timber frames, unless specially tested, may warp or fail when exposed to fire.
Benefits of steel frames include:
- High resistance to deformation
- Consistent structural integrity
- Long service life
- Compatibility with fire-rated hardware and seals
Professional door frame services ensure these frames are installed square, secure, and within the strict tolerances required for compliance.
Fire-Rated vs Non-Rated Metal Door Frames
It’s important to understand the difference between rated and non-rated frames.
Fire-Rated Frames
- Tested as part of a compliant doorset
- Installed in regulated fire-separating areas
- Must meet AS1905.1 and AS1530.4 requirements
- Used with certified fire-rated doors, seals, and hardware
Non-Rated Frames
- Used where fire separation is not required
- Suitable for general internal or external applications
- Not permitted in fire-isolated exits or regulated zones
Using a non-rated frame where a fire-rated one is required can result in serious compliance failures.
Key Installation Requirements to Be Aware Of
Even the best frame can fail if it’s installed incorrectly. Before installation, consider the following:
Wall Type Compatibility
Frames must suit the surrounding wall construction, whether masonry, blockwork, or stud walls, and be fixed according to the tested configuration.
Clearances and Tolerances
The gap between the door and the frame must not exceed 3 mm. Excessive gaps compromise fire performance.
Fixing and Packing
Approved fixing methods and fire-resistant packing materials must be used to maintain integrity under fire conditions.
Hardware Preparation
Frames should be prepped for hinges, locks, closers, and latches that are certified for use on fire-rated doors.
Engaging experienced door frame services helps eliminate these risks before inspection.
Common Mistakes That Lead to Non-Compliance
Many compliance issues arise from avoidable errors, including:
- Installing the wrong frame type
- Incorrect fixing to the walls
- Oversized gaps
- Use of non-rated hardware
- On-site modifications to frames
Understanding installation requirements early helps prevent costly rework and failed inspections.
Who Needs Fire-Rated Metal Door Frames?
These frames are essential for:
- Builders and developers of multi-storey buildings
- Strata-managed apartment complexes
- Commercial and office developments
- Hospitals and aged-care facilities
- Schools and universities
Any building with regulated fire-separating elements will require compliant frames installed as part of a tested doorset.
Frequently Asked Questions (FAQs)
Are fire-rated metal frames mandatory for all fire doors?
Can a standard metal frame be upgraded to fire-rated?
Do fire-rated frames need special installation methods?
Are fire-rated metal frames suitable for external use?
How do door frame services affect compliance?
What happens if a frame is installed out of square?
Who is responsible for ensuring frame compliance?
Get Compliant Fire-Rated Metal Door Frames in Sydney
If your project requires certified fire-rated metal door frames, our team can help. At BF Door Manufacturing, we manufacture and supply compliant frames and provide expert guidance on installation and integration with fire-rated doors. Contact us on 02 7247-2032 today for expert advice and a fast, compliance-focused quote.