Lowes and Home Depot sell racks for overhead storage. They have a "T" on top and a bottom rack going in both directions with a bent over hook on each end. I have extended the bottom rack using dowels in order to hang them on the wing and balance them. These work just fine. If you don't want to spend that amount of funds for them, look them over and then you can build some like them using pvc of an appropriate size.

HUDnOTOW