Curtail
Often a platform for a newel post, a curved curtail decorates the side of a staircase
A curtail is the first curved step of a staircase, and it extends to the side of the staircase at the landing. It serves as the base of the newel post and complements the volute (the spiral detail where the handrail or banister begins).
This is a classic curtail, found at the first step of the staircase. Note how it is longer than the other treads and provides a base for the newel post.
A modern curtail becomes a sturdy and secure landing for this narrow staircase.
When two curtails exist on either side of the staircase, it is called a double-sided curtail. Two curtails progressing up the stairs are a double curtail. And a curtail that does not extend past the treads of the staircase is called a bullnose curtail. This staircase has all three.
Carpeting has been cut away from the curtail of this winding staircase, highlighting the lovely curves.
A volute is the spiral detail at the beginning of the handrail, complementing the curve of the curtail below it.
This curtail stands out as the only curve alongside a five-panel door, a boxy newel post and the straight lines of the parquet floor.