Most bracket are placed under the shelves but I had this weird tiny space where I couldn't install bracket under the rack… So I designed this simple reversible bracket system for storing filament (see pictures).
It uses a 20mm diameter wood rod, so it's fairly modular in terms of width, cut to desired size.
Brackets can be installed up or down, or any combination of the two as long as they are aligned.
Backet is design so the wood rod can slide through. allowing for very wide shelf yet well supported, i.e. with as many bracket as desired per rod.
Once happy with the size, racket has holes for small screw to hold the two rods in place, making the rack sturdy. Nothing will move !