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.