After acquiring pallets from work I set out to use them , had no idea what for, but I couldn't let 12" full sided pallets just sit around. I started by driving T_post in the center of the pallets to hold the side walls up. Next I cut the back pallet to fit, then I attached the 50' cattle pallels to each side with scrap wood. Next I cut a 1/2'.sheet of plywood to fit the back wall, and secured it in place using.scrap 2x6 in side the rear pallet. Finally I spread the 12x 16.tarp on top, and secured it down using string, bungee cords.