Fabricator-produced assembly drawings In structural steelwork, which plans—prepared by the steel fabricator—serve as assembly drawings that guide field installation and member placement for the steel frame?

Introduction / Context:
Large steel structures require two complementary drawing sets: shop drawings, which define how each piece is fabricated, and erection plans, which show how those pieces are assembled on site. Knowing which is which streamlines coordination among fabricator, erector, and general contractor.

Given Data / Assumptions:

• Plans are produced by or for the fabricator.
• They function as assembly instructions for field erection.
• They include member marks, grid references, and sequencing notes.

Concept / Approach:
Erection plans provide a plan and elevation framework indicating where each marked piece (identified in shop drawings) is placed in the building grid. They may include piece marks, crane pick limits, splice locations, and special temporary bracing requirements. Welding is detailed in shop and connection drawings, but “welding plans” is not the standard term for the overall site assembly drawings. “Construction plans” is too general and typically refers to design drawings by the engineer/architect, not the fabricator’s assembly documents. “Assembly plans” is informal; the accepted term is “erection plans.”

Step-by-Step Solution:

Verification / Alternative check:
Examine a typical steel submittal: you will find shop drawings for each member and a set of erection drawings that map members to the building grid and elevations—these are the assembly guides for the field crew.

Why Other Options Are Wrong:

• Welding plans: not a standard comprehensive term for field assembly drawings.
• Assembly plans: informal phrasing; the industry-standard term is “erection plans.”
• Construction plans: refers to design contract documents, not fabricator assembly drawings.

Common Pitfalls:

• Using shop drawings alone in the field without referencing erection plans can cause placement errors.
• Omitting piece marks on erection plans leads to confusion during installation.

Final Answer:
Erection plans