Fire-Rated Steel Doors and Frames: A Specification Checklist

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A fire rated steel door specification should state the required fire resistance rating, the complete assembly including frame, hardware and seals, and the documentation the fire authority expects. Confirm the rating against the project's fire safety plan and have the manufacturer provide tested or certified assembly data before finalizing the drawings.

Confirm the Required Fire Resistance Rating

Start by confirming the fire resistance rating the door opening must achieve. This comes from the building's fire safety requirements and the position of the door within the compartment layout. Doors protecting stairwells, corridors, service shafts and separation walls often carry different requirements, so mark each opening individually on the door schedule rather than applying one rating across the project.

Verify the rating with your fire consultant before issuing the specification, since changes in occupancy or wall construction can alter the requirement.

Specify the Complete Door and Frame Assembly

A fire rated door only performs as tested when it is supplied as part of a complete assembly. Specify the door leaf, the frame, the glazing if any, the hinges, the latch and the closing device together, and require that each element is covered by the same certification.

Door leaf construction and core material
Frame profile, anchor type and wall connection
Intumescent seals and smoke seals
Hinges, latch, lock and self-closing device

Detail the Frame and Wall Interface

The junction between frame and wall is where many openings fail in practice. Show the frame anchoring, the fixing spacing, and the gap treatment in your details, and specify that the gap between frame and wall is filled with approved fire-rated material. Coordinate with the wall contractor so the opening is formed to the correct size before the frame arrives on site.

Exact fixing values should be confirmed with the structural engineer rather than taken from general references.

Specify Hardware and Closing Devices

Hardware must be compatible with the tested assembly. Specify fire-rated hinges with the required number per leaf, a latch that engages reliably, and a self-closing device so the door returns to its closed position after use. Avoid adding locks, decorative fittings or closers not included in the certified assembly, as these can invalidate the rating.

Where the door must be held open, specify a fail-safe magnetic hold-open linked to the fire alarm system.

Require Certification and Documentation

Ask the manufacturer for certification or test evidence covering the proposed assembly, and include a requirement for the labeling of each door and frame. Request installation instructions and a maintenance guide to hand over to the building owner. Clear documentation helps the fire authority approve the openings during inspection and keeps the project file complete.

Coordinate Site Inspection and Handover

Include a site inspection step in your specification. Check that the frame is plumb and square, the gaps are sealed as detailed, the closer works smoothly and the door latches without force. Record any deviations and resolve them before the finishes are applied.

Verify labels and certification match the schedule
Check frame installation and sealing
Test closing and latching on every leaf

Frequently asked questions

Can a standard steel door be upgraded to fire rated?

Generally no. A fire rated door must be manufactured and tested as a complete assembly, so the certified product should be specified from the start.

Do I need to specify the frame separately from the door?

Yes. The frame is part of the tested assembly, so specify it together with the door, including its anchoring and the wall gap treatment.

Does a door need a closer if it is normally kept shut?

Yes in most cases. A self-closing device ensures the door returns to the closed position after use, which keeps the fire barrier effective.

Who confirms the fire rating for a project?

The fire safety consultant and the relevant authority confirm the required rating. Your role as the architect is to specify it correctly and coordinate the documentation.

Common mistakes to avoid

Specifying a fire rating on the door alone while ignoring the frame, seals and hardware is the most common error. Changing a component after certification without checking the assembly can also void the rating.

Our recommendation

Create a door schedule that lists each opening, its required rating, the certified assembly reference and its hardware set, and send it to the manufacturer early so the documentation is confirmed before production begins.

Summary

A complete fire rated steel door specification covers the rating, the full certified assembly, frame and wall detailing, hardware, documentation and site checks.

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