Although there are lots of ways to build storage shelves, I have found the best approach is to use all thread rods for the shelf supports. Not only are they strong but they free up the most space on the shelves because there are no support brackets to interfere with the placement of any items you want to store on the shelves. Anything I would consider storing on shelves in my shop or garage, I have no concern about the all thread rods being able to handle the weight. Really heavy items, regardless of how much I trust the all thread rods, I still tend to build shelves with support brackets under the shelving to handle those types of items. But for typical things that I store for a while in my shop, the all thread rods are my choice without question.

My shelves in this video are also wider than typical storage shelves extending out about 18 inches from the wall. The 5/8 inch all threads handle what I'm placing on them with no trouble at all which really allows me to make good use of storage space on my walls and it also frees up lots of working space in the shop