Fig. 7From: Rationality in pier geometry of Kintaikyo Bridge from viewpoint of river engineeringModel of bridge pier. a Spindle (a model tilted by 12.75° is also shown). b Current. c Oval. d Non-regular hexagon. Curved parts in a and b are approximated by quadratic and cubic curves, respectively. Curves in c are both semicircles. Triangles in d are both equilateralBack to article page