I made one with 2x4's with arms at a 90* angle. Bought some webbing 4" online. The boats are poly. I can place then in easy and store them deck up or down and on their side. Good part is I can rotate them for cleaning or working on them easily. Living on salt water metal was not a long term I idea for me. They have worked out very well. I can move the two stanchions I made and store then any where. Now I need covers for them.