Garden arches may border the entry to a garden path or provide a focal point in your back yard. Flowering vines and other foliage can embrace and disguise the building material in your garden arch over time. You can build a metal garden arch with copper pipe and soft copper tubing that will hold up well in the elements and provide a simple structure for growing climbing plants and vines in your garden.
Cut four 5-foot lengths of copper pipe. Cut four 3-foot lengths of copper pipe. Cut four 12-inch lengths of copper pipe.
Connect a 5-foot length of copper pipe to a 3-foot length of copper pipe with the straight ends of a copper T connector to make one long pipe. Apply flux to the connection and solder the pipe to the fitting with a propane torch.
Repeat Step 2 three more times.
Attach another copper T connector to the end of the 3-foot long section of each pipe.
Place two of the long copper pipes side by side so the T fittings line up with each other. Make sure the T connectors are facing each other.
Insert a 12-inch length of copper pipe into the base of the facing T connectors. Apply flux and solder the copper pipe to the copper fitting. The two long pipes will be joined together by the sections of 12-inch pipe.
Repeat Steps 5 and 6 with the remaining copper pipes. This is the side frame for your garden arch.
Cut two 5-foot sections of soft copper tubing. Bend each section into a semicircle. Make sure that both semicircles are evenly arched.
Solder one end of each arch into the remaining opening on the copper T fitting at the end of the long copper pipe. Solder the other end of the arch into the T fitting on the remaining copper pipe.
Insert the straight ends of the garden arch at least 18 inches into the ground.