How do I build the T-Frames you recommend for vertical growing?

Graphically illustrated instructions for building and installing T-Frames are contained in the Mittleider Gardening Course – advanced section, Chapter 15, as well as other books. Here are the “guts” of it. For a 30′ Soil-Bed or Grow-Box, buy 6 – 8′ treated 4 X 4’s. Cut two of them into 6 equal-sized pieces 32″ long. …