Circular staircases are really winder stairs with the requirement that they curve around a center point or central axis and do not have a center post or column. They are usually large and sweeping and can be constructed in several methods. Freestanding circular staircases span between floors without an intermediate attachment. They basically attached to the lower floor and upper floor only. Hanging circular staircases are attached top and bottom like free-standing but they also attached to one wall for their full length. Usually this is the larger radius with inside radius open and complete with a sweeping balustrade. The third option is basically supported its entire length as well as top and bottom by walls. The walls may be beneath the stair so that it has open balustrade on one or both sides or the walls might completely enclose the stair so only a wall mounted grab rail is required. Circular staircases are the most luxurious and elegant style of staircase available.