What does 'seaming' refer to in sheet metal work?

Seaming in sheet metal work specifically refers to the process of joining two pieces of metal together along an edge or seam. This technique is commonly employed in various applications to ensure a secure and tight fit between metal sheets, which can enhance the structural integrity and prevent leakage or other failures in the final product.

In sheet metal fabrication, seaming is essential for creating products such as ducts, roofing systems, and tanks, where a reliable connection between metal parts is crucial. The process can involve different methods, such as mechanical seaming or crimping, which allow the metal pieces to interlock without the need for welding or other more intensive bonding techniques.

This definition highlights why the other options do not correctly represent seaming. For instance, cutting metal into triangular sections pertains to shaping, coating for corrosion protection focuses on surface treatment, and welding involves fusion of metals rather than merely joining them at seams.