Originally Posted by JoshTheSkier

It would have to be at least .125" wall to be even close to as stiff as aluminum or steel. At that thickness it's difficult to bend without work hardening it and assuming you have a hydraulic mandrel bender and the right torches/quenching medium to bend it without drastically affecting the metal, it would be so heavy and expensive it really doesn't make any sense.

But, if you want copper bars, go for it.