I have room, and would like to make, some storage for tools in an area under my deck using 3/4 in plywood. I could cement in 4x4 or something in the ground and build off of that but behind a retaining wall is probably lots of 1' stone (not sure how deep) and I'm not sure how secure it would be and i think a better idea would to just hang the cabinets from the joists. This is really only to hold lots of tool bags and some chemicals like pesticides and weed control. The deck will be waterproof above, and Ill have some area underneath to store hoses and small things. Is there any problems with this? Any suggestions?
(More info: I don't mind getting on a step stool if I need to reach far back, and I want to be able to partially disassemble if I need to get behind to work/inspect deck, gutters behind or clean behind. I'm planning on mounting 3/4 top along with sides of cabinets using pocket screws. I plan on putting a 2x4 to hold the back wall and using a locking shelf support pegs to keep it in place. I plan on putting the horizontal shelves using shelf standards and cabinet doors held with piano hinges.)