Door width measured to fit door, door frame and appropriate door margin.

C-track to be turned up by a minimum of 300mm for fire doors.

Place appropriate size timber stud within the frame where required.

Frame cut and bent to form the door head.

Frame to return down by a minimum of 150mm.

Provide additional frame for fixing the plasterboard above openings.

To prevent cracking at the door jamb opening, plasterboard joints should occur over the opening.

In a protected hallways a spandrel panel detail will be required.

Form a spandrel panel detail by using 12.5mm. Board sandwiched between the door opening stud and a short length of metal stud in the doorway head.

Screw fix through the metal stud, plasterboard, metal stud to provide a secure spandrel panel detail.