This is accomplished through the use of a closer or spring hinge and a fire rated lockset or exit device.
Fire safety doors standards.
Fire door regulations download this safetynet from box.
For 20 and 45 minute doors fire protective glazing can be used up to the maximum size tested.
A fire door is more than just the door itself it refers to the door the fixings the fitting the ironmongery latches handles etc and the frame.
This includes specialty tempered glass filmed or laminated ceramics or filmed wired glass.
Another safety consideration that affects the size of the glazing panel in fire rated doors is the transmission of radiant heat through the glazing.
Standard for fire doors and other opening protectives this standard regulates the installation and maintenance of assemblies and devices used to protect openings in walls floors and ceilings against the spread of fire and smoke within into or out of buildings.
The door itself is usually made from a solid timber frame but they can sometimes be covered again in fire resistant glass.
Fire doors should be compliant and tested to bs 476 part 22 or to the european equivalent bs en 1634 1.
This means that in the event of a fire all of these doors will close and latch without a person s help.