The in_strong_corr#_0# is missing these two pieces: three corner pillars and two corner pillars on oppisite sides. If these new assets had vanilla names they would be in_strong_corr4_05 and 06. These don't need strongruin variants. The vanilla meshes to base this off of are i/in_strong_corr4_01-04.nif.
A quick UV edit in nifskope on the bottom of the meshes: tr_in_c_plain_r_rail00.nif and tr_in_c_plain_r_rail01.nif the UV is no longer 1 dimensional, it now is 2D with both the U and the V lol
I got absolutely sick and tired of having to squeeze through the Almas Thirr Canalworks and Waistworks whever I wanted to walk from the lower levels to the cantons. So frustrated in fact that I decided to pick up Blender and do something about it.
I present to you: a buttress piece with stairs in them, for easy access between canton and dockside. Mesh is called tr_ex_vivec_b_b_02 is based on the vanilla ex_vivec_b_01 and ex_vivec_b_tb_01 meshes, with my own edits to the stairs. Also has a collision mesh, it's no beauty but it should work.
