I'd suggest that you set some stainless steel flat bar in the concrete, sticking up two or three feet into the "trunk" of the copper tree, as a stub to bolt the tree to. Four or five pieces of 3/8" by 1-1/2" flat bar should give more than enough support and provide a very secure anchor, and you can still "adjust" it with a sledge hammer to conform to the finished contours of your tree trunk. then the tree can slip over the stainless and be drilled and tapped for flat-head copper machine screws. Once the tree is bolted in place you can soft-solder some decorative caps over the screw heads if you want to hide them. You'll still be able to remove the tree for service work if need be, it will just take some extra work.
Will, I'd suggest that you
Will,
I'd suggest that you set some stainless steel flat bar in the concrete, sticking up two or three feet into the "trunk" of the copper tree, as a stub to bolt the tree to. Four or five pieces of 3/8" by 1-1/2" flat bar should give more than enough support and provide a very secure anchor, and you can still "adjust" it with a sledge hammer to conform to the finished contours of your tree trunk. then the tree can slip over the stainless and be drilled and tapped for flat-head copper machine screws. Once the tree is bolted in place you can soft-solder some decorative caps over the screw heads if you want to hide them. You'll still be able to remove the tree for service work if need be, it will just take some extra work.