Application of welding to large structures Is welding commonly used to fabricate or assemble large structures that are difficult or impractical to build entirely within a shop environment?

Introduction / Context:
Many engineered products exceed the size or logistics limits of shop fabrication. Bridges, tanks, pipelines, ship sections, and structural frames are routinely joined on site. This question checks awareness that welding is central to such field assembly.

Given Data / Assumptions:

• Structural components may be prefabricated in modules.
• Final joining occurs in the field using qualified procedures.
• Constraints include transport limits, crane capacity, and site access.

Concept / Approach:
Welding enables modular construction: pieces are cut, formed, and partially welded in the shop, then transported and welded together at the installation site. Procedures address environment, preheat, consumables, distortion control, and inspection. Field welding complements bolting where appropriate.

Step-by-Step Solution:

Verification / Alternative check:
Review construction codes and industry practices (bridges, ships, tanks) that prescribe field welding operations when full shop fabrication is infeasible.

Why Other Options Are Wrong:
Limiting to a single material (aluminum) or calling field welding “temporary” is incorrect; field welding is permanent and code-governed. “Applicable solely to bolted structures” contradicts the premise.

Common Pitfalls:
Underestimating weather protection, access for preheat and post-weld operations, and inspection logistics.

Final Answer:
Correct