I'm assuming they are around 6 ft tall. No way they are going to be "freestanding" & survive wind. At the top you would need to attach them to steel pole or framework that is attached to house. I've seen them used as corners on a patio & with canvas type fabric on the frame so can "close off" 1 section. Even if you had several the height would make them unstable in wind. You could use a galvanized piece available at Home Depot or Lowes "U" shaped pieces but with squared corners to slip over the bottom in 4 places, painted to match & then bolted into the cement I think some come with bolt. Talk to the store & they could help you on that. I secured my gate that way, or course existing cement you either have to cut out concrete or add extra. Quality of doors would have lot to do with trying to do anything with them. If they are not very strong & well painted with outdoor paint that would stand up to the weather, wouldn't be worth going to all the trouble. Could Google in "louvered doors for patio" & see what comes up, might give you better idea of what you can do with them. Good Luck!