A fire door is a door with a fire-resistance rating used as part of a passive fire protection system to reduce the spread of fire and smoke between separate compartments of a structure and to enable safe egress from a building or structure.
Fire doors and doorsets are rated in minutes and prefixed by the letters FD.
'FD' denotes the amount of time the fire door will resist fire for. ie FD30 will resist fire upto 30 minutes. In the UK the most common fire doors are either 30 minutes (FD30) or 60 minutes (FD60).
In certain applications, the regulations may state that smoke control is also required as an additional requirement. In these cases the fire door will be designated by the suffix 's' and a combined intumescent and smoke seal must be fitted.
The building regulation relates to the entire door installation, and not just the door alone. Because of this, fire doors are not tested as individual leaves, but as a complete installation, along with frame, locks, latches and other essential ironmongery.
Every fire door MUST be fitted to the manufacturers specifications.
The door manufacturer will be able to advise you on the exact products needed for your door.
Always ask your door manufacturer if they require a specific brand or rating to be fitted.
Some door manufacturers will restrict you to a brand of seal, ironmongery etc.. which could increase the overal cost of fitting your fire door.