After pulling wood pallets apart, I put them through the thickener/planer before putting each panel long sides onto side supports, which are made of ripped down stringers. I then screwed the side (small) panels onto the larger ones (on the stringers) with legs (which are longer than the 5 boards down) out the bottom so air circulates. The sizes of the screws are in relation to the requirements that I needed.
I did 1 piece at a height below the top panel from the short side to the short side to hold my pots in place. the finish dimensions are roughly 90 cm long by 30 cm wide and 50 cm high. This was a basic build as I am a beginner at woodwork.