(Part 6 of 13 in Scaf 101)
This is simply a slight variation on the “cube” build. You can either assemble it this way, or slide the 90° two outlet tee clamps along the vertical legs when you’re done with your cube.
In the cube build, when you’re assembling the upper frame – the second half of the build – simply lower the position of the 90° two outlet tees. Alternatively, you can convert the cube into this by loosening the 90° two outlet tees on the four corners and then slide the frame down the verticals. (Truth be told, I had to coerce the frame down with a rubber mallet.)