First, the vast majority of DIY shelving is grossly overbuilt. I discovered this when I started working for a large stair and mllwork shop. The entire second floor of the production facility, about 6000 sq. ft. was covered in site built shelving. It was all custom sized to accommodate specific items and many shelves were loaded with a lot of weight, such as stacks of hundreds of pounds of Closet Maid wire shelving. The only material used was 1/4" luan plywood, 1x3 furring strips, small scrap wood blocks used as glue blocks, 1/4" x 1-1/4" air staples and yellow wood glue. Since that time I have outfitted a garage and a barn for personal use, using the same lightweight techniques. These things look like every 2x4 and 1/2" plywood shelf built, but all the material is downsized. As a result you can hook an empty 16" deep x 8' long x 6' tall shelf unit on your shoulder, and carry it around with ease. The 16" depth is important too, as it allows for three rips from a sheet of ply, and is plenty deep.
I did something completely different a few months ago, when it was time to outfit the home we just bought. I headed to the big box store to grab all the usual material to build the same shelves I had built for decades. I then noticed something that I didn't anticipate. In the few years since I FIREd, lumber prices have shot through the roof, and my typical cheap shelving project was anything but. I decided to run the numbers and found that I could buy heavy duty chromed wire "Restaurant" shelving units for 30% more than the pile of lumber needed to build the shelves. As a result I have several units similar to the ones in the posted link, in my garage, and couldn't be happier. I put casters under all of them, so I can easily roll everything out into the driveway if I need to clean behind them. They totally blow DIY shelving away, and can be reused, relocated and even resold if no longer needed. When I priced different units on Amazon they can out to roughly $20-30 more than a pile of material needed to build a similar one. Once labor is factored in, I would actually loose money to end up with an inferior product.
https://www.amazon.com/TRINITY-EcoStorage-5-Tier-Shelving-72-Inch/dp/B00DSXQL1S/ref=sr_1_5?ie=UTF8&qid=1494590545&sr=8-5&keywords=nsf+wire+shelving