Double margin doors
Encyclopedia
Double margin doors
Peter Brett (in his book - purpose made joinery) describes this door as a pair of narrow doors joined together at the meeting stile to make a single door with the appearance of a pair.It is used for door openings that are too wide for a single door but where a pair of doors would be difficult for people to manoeuvre past. An example of a double margin door can be seen at the entrance to 10 Downing Street
10 Downing Street
10 Downing Street, colloquially known in the United Kingdom as "Number 10", is the headquarters of Her Majesty's Government and the official residence and office of the First Lord of the Treasury, who is now always the Prime Minister....
.
A bench joiner
Joiner
A joiner differs from a carpenter in that joiners cut and fit joints in wood that do not use nails. Joiners usually work in a workshop since the formation of various joints generally requires non-portable machinery. A carpenter normally works on site...
will need to be aware of the correct procedure for assembly of this type of door. Firstly he will glue and wedge the rails to the meeting stiles and then join the two meeting stiles together with the folding wedges, the through top rail and the metal bar recessed into the bottom of the door. Then the panels are slid into their places from the outsides. Of course he will follow good practice when inserting the panels, he will ensure that there is no glue in the groove that will stick the panels to the groove thus allowing the panels to move independently of the rails and stiles so they will not split as the door shrinks or expands. If the door is to be polished he will ensure that the panels are pre-polished with at least one coat to ensure that no bare wood is shown if the panels shrink. Once the panels are inserted the bench joiner will assemble the outer stiles, cramp
Clamp (tool)
A clamp is a fastening device to hold or secure objects tightly together to prevent movement or separation through the application of inward pressure...
and ensure the door is square before wedging up the mortise and tenon
Mortise and tenon
The mortise and tenon joint has been used for thousands of years by woodworkers around the world to join pieces of wood, mainly when the adjoining pieces connect at an angle of 90°. In its basic form it is both simple and strong. Although there are many joint variations, the basic mortise and tenon...
s of the outer stiles.
After cleaning up and sanding the face and back of the door he will fit the bolection moulding and cover moulding in the standard way by screwing through slotted holes in the panels into the bolection moulding and then covering the screw heads with the internal cover moulding which is pinned to the frame of the door and not the panel.
External links
Further reading
- Carpentry and Joinery for Advanced Craft Students: Purpose Made Joinery by Peter Brett ISBN 0748702970.
- Carpentry and Joinery 3 by Brian Porter, Chris Tooke ISBN 075066505X