8-2 step prismatic alterprism

The 8-2 step prismatic alterprism is a convex isogonal polyteron that consists of 2 8-2 step prisms, 4 tetragonal disphenoidal gyroprisms, 16 bilaterally-symmetric triangular duotegums, and 16 bilaterally-symmetric pentachora. 1 8-2 step prism, 2 tetragonal disphenoidal gyroprisms, 6 bilaterally-symmetric triangular duotegums, and 5 bilaterally-symmetric pentachora join at each vertex. However, it cannot be made uniform.

Using the ratio method, the lowest possible ratio between the longest and shortest edges is 1:$$\frac{\sqrt{6+2\sqrt2}}{2}$$ ≈ 1:1.48563.