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Make an old ladder garden arbour.. in minutes! via FunkyJunkInterior...
DIY Metal Trellis Plans: How To Make A Garden from Copper Pipe l Copper, while superb, is very expensive. You should be able to make this of plastic covered plumbing pipes (such as SP), as well. Once the arbor is covered with plants, it will be invisible, anyway.
Arbor Notch Beams. Easier way of attaching beams on the grape arbor. Sturdy and not complicated to do.