Who has the option of approving the use of oversized and slotted holes in bolt installations?

The option to approve the use of oversized and slotted holes in bolt installations typically lies with the Engineer of Record. This is due to the Engineer's responsibility for ensuring that the structural design meets the requisite safety and performance standards. The Engineer of Record has a comprehensive understanding of the structural implications of design choices, including the effects that oversized and slotted holes can have on load distribution, structural integrity, and overall performance.

Oversized and slotted holes may be used to accommodate misalignments and allow for adjustments during installation, but they can also affect the strength and behavior of connections. Therefore, the approval process involves a careful consideration of the design specifications and the potential impact on the structure's safety. The Engineer of Record reviews and evaluates the proposed modifications, ensuring they align with relevant codes and standards, and authorizes their use accordingly.

While other parties, such as the site supervisor or project manager, play important roles in overseeing construction processes, they typically do not possess the technical authority or expertise to approve such critical design aspects. The fabricator may have insights into practical applications, but final approval rests with the Engineer of Record to ensure that the structural design and connection details are properly interpreted and implemented.