You'd have to ask K, but i think he wants to make each section a cross instead of just a diagonal.
Not to mention I've got half of it double-dug with manure and mulch, but the other half remains. I should note that we did not treat the bamboo with any preservative, which means it will most likely last 2-4 years. This does not worry us as bamboo is invasive down here and there's plenty more where that came from, plus we wanted a less permanent structure as well.
Just for funsies, a shot of the cold frames-- on the south side of the house and planted with melons, squashes, basil, tomatillos, and holding my strawberry plants I bought all green with flowers. Everything will stay in until after Easter, which is the set-out date around here.