Does the erection plan tell you the grade of steel?

Does the erection plan tell you the grade of steel?

• A. No: The grade is determined by the structural engineer
• B. Yes: The grade is shown on erection plans
• C. Only for certain structures
• D. Not specified anywhere

Answer: (A)

The fundamental point is that material grade is set by the design documents, not by the erection plan. The erection plan focuses on how to assemble and place the members—locations, alignment, connections, anchor bolts, lifts, and sequencing. It normally does not carry the material specification. The exact steel grade is specified by the structural engineer in the contract drawings and specifications (and supported by the steel supplier’s certificate or shop drawings). So you don’t rely on the erection plan to tell you the grade; you refer to the project specs and shop drawings to confirm the required grade.

The fundamental point is that material grade is set by the design documents, not by the erection plan. The erection plan focuses on how to assemble and place the members—locations, alignment, connections, anchor bolts, lifts, and sequencing. It normally does not carry the material specification. The exact steel grade is specified by the structural engineer in the contract drawings and specifications (and supported by the steel supplier’s certificate or shop drawings). So you don’t rely on the erection plan to tell you the grade; you refer to the project specs and shop drawings to confirm the required grade.