What do fire door ratings mean?
Fire door performance is rated in terms of resistance, and therefore the contribution a door makes to compartmentation and slowing the spread of fire.
It is declared as a number of minutes – 30, 60, 90 or 120 minutes – and ratings can be determined by both British Standard or European Standard test methods. Under the British Standard, a fire door rated for 30 minutes resistance is designated FD30; one rated for 60 minutes resistance is designated FD60, and so on.
The rating for a fire door includes the complete assembly. That means the frame, intumescent seals, smoke seals (if required), lock, hinges, glazing and any other optional door furniture required for the application, all working in conjunction with the door leaf itself to achieve the necessary performance. Read more »