I got really sophisticated with my strength testing. Or not: knowing I'd be storing metal pipe at most, I bounced up and down on each horizontal supp...
Here's how to use old pieces of fence post to create an a-frame lumber storage rack, holding lots of material in a small amount of floor space. This is cheaper and more environmentally friendly than buying a commercial lumber-storage doohickey (here's the $140-ish unit i based my design off of).
Step 1: Pick / refine your design
having frequently been frustrated from my lack of planning in projects, i decided to try a bit more planning. the picture below is what i ended up with, vaguely to scale thanks to trusty graphing paper. doing this made my project turn out substantially better (and get completed quicker) than it otherwise would have: a bit of planning goes a long way, apparently!