The swing arm access platforms are fortunately much more structured.

Service arm access platforms

Service arm access platforms at Level 120

Here is an example for Level 120. There is the tower landing on floor level, and the arm landing on the side of the swing arm. The level difference is then closed by a variable link.

Service arm access platforms

Service arm access platforms

Here is the swing arm cluster between Level 120 and Level 160. The access platform for swing arm #4 (the top one in the picture), that is also accessed via Level 140 like the arm below, is special. The platform winds around the main column, and the access stairway is on the inside ...

Service arm access platforms

Service arm access platforms

... as you can see here. I didn't have any construction plans for this platform, but I'm very sure I got it right, because the rules for the platforms are relatively easy to understand, and it's just a matter of being high enough to get past the diagonal column. And the space above the column I could derive quite well from photos.