What are the drawings called that indicate the positioning and location of steel pieces issued to the contractor?

Erection drawings are specifically designed to provide the contractor with the information necessary to fabricate, position, and install steel components on a construction site. These drawings detail the placement and alignment of steel pieces, ensuring that they are erected in accordance with the project specifications and structural requirements. Erection drawings typically include dimensions, connection details, and any necessary notes that guide the assembly and installation process.

While construction drawings provide an overall view of the project, including plans, sections, and elevations, they do not focus solely on the specifics of steel erection. Shop drawings, on the other hand, are produced by the fabricator and detail the fabrication of individual components, including dimensions and manufacturing specifications. Detail drawings provide a closer look at specific aspects, but without the comprehensive layout and positioning information that erection drawings offer for the assembly process. Therefore, due to the focused nature and purpose of erection drawings, they are the correct answer in this context.