It is tempting to think of a fire door as the leaf and the frame, with the metalwork as detail. In fact the hinges, locks, latches, closers and letterplates are part of the certified assembly. They were present when the door was tested, and swapping them for the wrong parts can quietly invalidate the rating the door was sold with.
This article looks at the hardware on a fire door, why it is more than detail, and what an inspection checks.
Hinges carry the weight of the leaf and keep it aligned in the frame. On a fire door they have to do that without failing in heat, so they matter more than on an ordinary door.
An inspection checks that:
Worn or under-specified hinges let the leaf drop. A dropped leaf opens up gaps and stops the door closing cleanly, so a hinge problem often shows up as a gap or closing problem elsewhere.
The latch is what holds the door shut against the frame. On a fire door it has to engage reliably, because an unlatched door can be pushed open by the pressure a fire generates. Locks, latches and handles must be fire-rated, compatible with the door, and operate correctly. Mortice work for locks and latches removes material from the leaf, so it has to be done within what the certification allows.
A letterplate is a hole cut through a fire door, so it is only acceptable if it is a fire-rated letterplate with the intumescent protection it was tested with, fitted to a door certified to take one. The same applies to any air transfer grille: on a fire door it must be an intumescent fire grille. A standard letterplate or grille cut into a fire door is a clear failure.
A fire door is certified as a complete assembly, tested with particular components together. Fitting a hinge, closer or lock that was not part of that test, or that is not covered by the door's certification and the hardware's own fire test evidence, breaks the chain of evidence that says the door will perform. This is why "it looks fine" is not the test. The question is whether each item is fire-rated and compatible with the certified door.
That principle runs through the whole inspection checklist, and the self-closing device, the most safety-critical piece of hardware, gets its own treatment in our guide on self-closing devices and hold-open. The detailed standard behind all of it is BS 8214.
The hardware faults inspectors record most often are missing or loose hinge screws, non-fire-rated hinges or handles, standard letterplates cut into fire doors, and incompatible closers. Most are straightforward to put right once they are identified, which is the value of checking in the first place.
DoorTRACE records the result of every hardware check against the door, with photos, so a missing screw or a non-rated letterplate becomes a tracked defect rather than a note that gets lost. Recurring hardware problems on a door show up across its history. Explore the platform or book a demo.
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