Question about twisting tower

Hi All,

I'm currently working on creating the twisting tower with inside and outside perimeters, but I have the problem of creating the outside perimeters. When I explode the offset triangles, the edges of triangle is not continuous. I'm wondering if anyone know how to figure out the problem?

Also, I want to create the vertical beams in corner like on the attachment but I don't know how to create the continuous one.... Sorry I'm new in Grasshopper. Please please does anyone know how to do it??? Thank you so much!!!!

Twisted Tower.gh

Tower Component with base.pdf