What does FD30 mean?

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FD30 means the door held back fire for at least 30 minutes in a test.

FD60 is the same for 60 minutes. The number is minutes.

A single door with a narrow glass panel
A single door with a narrow glass panel

The letters

F stands for fire and D for door. An S after the number, such as FD30S, means the door also has smoke seals, so it is tested against cold smoke as well.

What the test covers

The result belongs to the whole doorset. That means the leaf, the frame, the hinges, the seals, the closer and the glass if there is any.

A good leaf in the wrong frame does not carry the rating with it. Nor does a different closer, or a third hinge missing.

Where you see it

On a label or coloured plug in the top edge of the door, or on the hinge side. Sometimes on a tag on the frame.

If you cannot find one, the paperwork from when the door was supplied is the next place. If there is none, we write down that the rating is unknown.

Which one you need

It depends on the building and what it separates. Flat front doors are very often FD30S. Doors to a stairwell or plant room may need more. Your fire risk assessment or the building's design says which.

We do not choose the rating. We check that the door in front of us matches it and is in good condition.

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