A well-designed curved staircase offers much more than its functional purpose. Beautiful and complex, curved stairs are considered the pinnacle of stair craftsmanship.
Helical staircases differ from spiral staircases as they do not have a newel, and handrails are present on both sides. They are also not limited to a circular staircase and may be built in an elliptical or oval shape.

Without a newel for support, better materials and/or construction is required for helical stairs compared to spiral stairs. “Winder” or “curved” stairs refer to stairways that make a turn without including an intermediate landing or platform to provide a flat rectangular turning space.

Advantages of Curved Stairs

1- Curved staircases are often very elegant and traditional but this type of design can equally be adapted to contemporary designs.

2- They are relatively easy to walk up (if the radius is large).

Disadvantages of Curved Stairs

1- Curved stairs are by far the most difficult to build of the various types of stairs. In fact building, curved stairs represent a pinnacle of achievement for any stair builder or fabricator. For this reason, they are the most costly to build.

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