angled stairway
A generally L-shaped stairway with one turn of about 90 degrees between successive floors, using a landing or winders.
Angled stairways are generally close to L-shaped, with one turn of about 90 degrees between successive floors. They have a landing at the turn, or the individual steps can cover the turn in a "winder" formation.
If a stairway consists of successive angled flights arranged in a continuously rising square or quadrangle, it is classified as a rectangular helix. Angled stairs are generally used for single flights, although they can also repeat in parallel fashion on successive floors. They are more common in houses than in other buildings.
A landing is optional because winder steps can make the turn. A continuing polygonal circuit around a central space instead belongs to angular helix, as distinguished above.
