The craft is collective: architects, engineers, and makers repeat on models, refining joints, coatings

https://www.scribd.com/document/1042186110/Snow-Guard-Truths-Copper-s-Unequaled-Longevity-in-Alpine-and-Coastal-Projects-173583

The craft is joint: engineers, designers, and fabricators repeat on models, refining joints, finishes, and resistances up until sophisticated concepts come to be buildable metal.