Double fire doors

[Guest Simon]

I have beens asked to replace a fd30 double vision 16g fire door, this door is part of a set if double doors, am i allowed to replace just one door or do I need to replace both?

[Tom Sutton]

If you are replacing a fire door it should be done using the latest standards which in this case is fitting a certificated fire door set which are the doors and frame. 

Check out  http://www.asdma.com/pdf/BPG.pdf