Truncated octagonal duoprism

The truncated octagonal duoprism or trodip is a convex isogonal polychoron that consists of 16 truncated octagonal prisms and 64 tetragonal disphenoids. 1 tetragonal disphenoid and 3 truncated octagonal duoprisms join at each vertex. It can be formed by truncating the octagonal duoprism.

It can also be obtained as the convex hull of 2 semi-uniform octagonal-hexadecagonal duoprisms chosen such that the hexadecagonal and octagonal prisms have the same circumradius. if the hexadecagons of this duoprism have edge length 1, the octagons have edge length $$1+\sqrt{4-2\sqrt2} ≈ 2.08239$$.

Using the ratio method, the lowest possible ratio between the longest and shortest edges is 1:$$\sqrt{\frac{2+\sqrt2}{2}}$$ ≈ 1:1.30656.