What do welders primarily work with in the construction field?

Welders primarily work with joining metals using high-intensity electrical arcs, which is a fundamental process in welding. The use of electrical arcs allows welders to create strong, permanent connections between metal components by melting the edges of the metals and adding filler material, when necessary, to form a joint as the molten metal cools.

Welding is crucial in various construction projects, as it provides the strength and integrity needed for structural elements. This process is essential for creating frameworks, bridges, pipelines, and a wide range of other metal structures, making the welder's role vital in ensuring that these constructions are safe and durable.

In contrast, electrical systems focus on wiring, circuits, and power distribution; mechanical piping systems involve the installation and maintenance of pipes for fluid transport; and wooden frameworks pertain to carpentry and construction involving wood, which does not typically involve welding techniques. Thus, the primary focus of a welder is indeed the joining of metals using high-intensity electrical arcs, making this the correct answer.