My granny wanted a storage bin for her gardening tools (of which she has many) and I ended up getting the job. She has scads of scrap lumber so the only thing we had to buy were the casters. I used this write-up as a starting point and modified it according to her needs. The finished piece is 6′ x 2′ with dividers placed at every foot mark except for the center which was left open 2′ to accommodate larger tools. I suggested the casters because she wanted to keep the bin up off the floor in case water leaks in. Plus I just like putting casters on things.