Can I make and sell a fire rated doorset?
You can but there needs to be test evidence to justify the design, look at the following 3 options, they are....
1; Use a door (or door blank) and frame that each already have a certificate of compliance.
2; Send the type of door and frame (intended for sale) to a UKAS- accredited laboratory for type approval to (BS 476: Part 22: 1987 or BS EN 1634 -1 2000)
3; Have the doorset design assessed by qualified fire engineers using existing data of fire tests instead of a fire test.
We would suggest using pre tested items which are more readily available and adapting them to suit your needs, eg; a fire tested frame and a fire tested door, it is a laborious process not to mention costly to try and get a “type” approval for each and every doorset that you may require.