The Spiral Staircase is one design that you can try. This type of ladder is circular or curved consisting of rungs, or treads, that connect to a central column. The tread rotates around this center point as you go up or down the stairs, creating a spiral design. A spiral staircase is not the same as a helical staircase or a curved staircase, which does not have a center column.
There are several factors that influence the design of this one staircase. When considering design, you should think about the height, diameter, and location of the stairs along with other functional and aesthetic factors such as tread style, steps, and handrails.