I believe this is the optimal firewood storage rack design, considering cost, ease of construction, capacity, and effectively keeping the wood up off the ground. It’s also modular, allowing for additional rows to be added and all covered with a single big tarp. Materials are regular cinder blocks, 2x6es, and a couple 4x4 blocks. I cover it with a heavy duty tarp I had laying around from one of those tent garages I took down. This one is 20’ long because that’s what I had space for. I could have made it taller, but then it would be hard to reach the wood on the top. Each row holds about 1.3 cords (20x5 feet). If you know a better design, let’s hear it!