The craft is collective: engineers, engineers, and makers iterate on prototypes, refining joints, coatings

https://www.scribd.com/document/1058827467/Snow-Guards-Not-A-Surprise-The-Century-Scale-Case-for-Customized-Copper-196153

The craft is joint: engineers, designers, and fabricators iterate on prototypes, refining joints, surfaces, and tolerances till classy ideas come to be buildable metal.