Update: shelf brackets beat cinder blocks for my shed corner and I'm a little annoyed
Spent $28 on a pair of 12 inch steel L brackets last week after two seasons of stacking my paint cans on cinder blocks that kept getting damp and ruining the labels. The brackets lifted everything 8 inches off the slab and the mildew smell in the shed is basically gone now. Should I run a second row higher up for the bags of potting soil, or does that pull too much on old studs?
Two seasons of damp cinder blocks and you're calling 28 bucks a win? The mildew smell probably left because it finally dried out, not because of 8 inches of air. Old shed studs are usually 2x4s that have been soaking up moisture for decades, and a row of potting soil bags can hit 40 or 50 pounds each, which adds up fast. I'd check if those studs are solid before hanging anything else on them, poke them with a screwdriver and see if it sinks in. The brackets might be fine but the wood holding them is the real question here.