Jun 17, 2008 · So here’s my proposed bin system: 4×4 (or 6×6, still unsure) posts, 2×6 lumber for outside framing. The sides and back will be that stout metal poultry netting/hardware cloth, since I already own a roll. The winters have been mild enough that my compost still cooks, so I figure that if I needed some insurance I could always stack straw