Graphical Construction Glossary >> Doors. >> Door types >> Folding Doors
Not previously used much in residential construction these doors used be mostly seen in commercial buildings.
The basic folder at the top illustrates a few important points.
Multi folding Doors. It is possible to increase the width of the opening and to add more leaves as shown above. So in certain conditions it is quite feasible to open up large sections of wall without the hassles of fixed panels or mullions.
Above is a sketch of a different layout. This is an option when heavier doors or wider openings are used. The centre support position means that the whole of the weight of the leaves are held by the track, rather than just one side.
The photo above shows a modern aluminium set up at the top hanger. In this case the hardware is a combined butt hinge and roller hanger. At the bottom of the same pair of leaves is a combination hinge and roller pin. The pin at the bottom is not carrying and weight, is there to keep the door located in the correct position and for security when the doors are closed.
Here's a photo of a common way of sealing the gap between two folders. The aluminium ones above use rubber or neoprene inserts to do the same job.
In the sketch above one version shows the last leaf still open. This is a typical position in a lot of cases. I did a verandah - patio door like this a few years back. When the doors are closed and bolted, the last one becomes an ordinary day to day entrance door. In effect it is the live leaf. Entry is gained from the live leaf and then all the remaining doors are unbolted from the inside.
Quite often on commercial work the stack of leaves that are in the open position, are fitted into a special recess, pocket or as it is sometimes called, a docking bay in the wall.
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