Field assembly terminology in steelwork In structural steel projects, which items are fabricated in the shop and then joined together on site (in the field) to create the overall structure?

Introduction / Context:
Structural steel work typically splits into two phases: shop fabrication and field erection. Understanding the vocabulary used by fabricators, erectors, and detailers helps clarify drawings, schedules, and responsibilities during construction.

Given Data / Assumptions:

• Components are prepared in a fabrication shop according to detailed drawings.
• These components are transported to the site.
• They are then joined together during erection to form the final structure.

Concept / Approach:
Steel fabrications are the shop-made pieces (beams with end plates, braced frames, trusses, stairs, railings) produced from raw steel sections and plates by cutting, drilling, welding, and finishing. On site, the erector lifts and connects these fabrications per erection plans. While main members are primary components, the term does not convey the shop-to-site workflow. “Riveted members” describes a connection method rather than the objects themselves, and “assembled fabrications” is not standard terminology in drawings or specifications.

Step-by-Step Solution:

Verification / Alternative check:
Review typical steel submittals: shop drawings detail fabrications; erection drawings show how those fabrications are connected on site. Delivery tickets and piece marks correlate to fabrications, confirming common practice and terminology.

Why Other Options Are Wrong:

• Riveted members: describes an obsolete connection method in most regions; not a category of components.
• Main members: too generic and not tied to the shop-fabrication process.
• Assembled fabrications: not a widely used term in standard documentation.

Common Pitfalls:

• Confusing shop drawings (fabrication details) with erection drawings (site assembly sequence).
• Assuming connection method defines the component; it does not.

Final Answer:
Steel fabrications