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Hinged leaves folding back against each other.
Also known as: Folding door plan symbol, Concertina door symbol
On an architectural plan a bifold door is drawn as two or more narrow leaves hinged together, folding back concertina fashion into a shallow stack.
Denotes a door of hinged leaves folding against one another to clear the opening.
Contexts: Technical drawing
Clears most of the opening while sweeping much less floor than a hinged door of the same width.
Contexts: Technical drawing
A break in the wall with two or more short leaf lines drawn at angles to one another, hinged in a zigzag.