The craft is joint: engineers, designers, and makers repeat on models, refining joints, coatings

https://www.scribd.com/document/1041906801/Dormers-That-Don-t-Trick-The-100-Year-Efficiency-of-Custom-made-Copper-by-Salvo-Metal-Works-150522

The craft is collaborative: architects, designers, and fabricators repeat on models, refining joints, finishes, and resistances up until stylish ideas come to be buildable steel.