I built some racks like yours and picked up some used metal roofing and plan on doing the same as you did. looks good.Super basic shed. It’s oak pallets for the floor, elevated off the ground using bricks with weed mat underneath to prevent weeds.
23’ long, 3’ deep, 6.5’ high under the rafters at one end and 5’ high at the low end. Salvaged cedar 2x6 rafters, plywood roof deck, and tin roofing. Cost was $0 - everything was a leftover or salvaged. It’s open on all sides plus the elevated floor & space between the rafters allows for good airflow. I've also left a gap between the rows of splits to allow drying between them.
The metal shed next to it is ~5.5’ from the south edge of our property (the fence) so I built the shed in the gap to get southern exposure all year and utilize the requisite 5’ setback. Neighbor is fine with it.
Edit: Fixed image rotation
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