How do I conceal the lift shaft escape door to EN81-20?

How do I conceal the lift shaft escape door to EN81-20?

Selo manufactures the first ever concealed door set that meets the requirements for EN81-20 for Lift Shaft Escape Doors. This standard is for the use with Lift Shaft Escape Doors, Emergency Access and Inspection.

Once fitted in place, the door frame can be plastered or it can be taped and jointed up to the integral stop bead of the frame providing a perfectly flush finish once completed. The doors have been mechanically tested for impact resistance to the requirements of EN 81-20 for Emergency Escape Doors. The doors have been bi-directionally fire tested to EN1634.1