looking for some advice on creating a triangulated tower

 From:  bemfarmer
8640.6 
Assuming the same triangular pattern of struts, the perimeter struts will have to be longer than the struts connecting to the larger center tube.
This will be embarrassing when the astronauts weld or bolt in the wrong lengths:-)
Unless the robotic welders can tell the difference.
I'd like to see the engineering specs.
- B