Who must approve the use of alternative washer-type indicating devices?

The correct answer is that the Engineer of Record must approve the use of alternative washer-type indicating devices. This is because the Engineer of Record holds the responsibility for the design and integrity of the structural components in a project. Their approval ensures that any alternative materials or methods, like the washer-type indicating devices, meet the required structural specifications and safety standards set forth in the project.

The Engineer of Record evaluates the performance of these devices in relation to the overall design, ensuring they align with the engineering principles and regulatory requirements. Additionally, having the approval from this qualified professional provides a layer of accountability and assurance that the alternative methods will not compromise the structural integrity of the assembly in which they are used.

Other roles, such as the Inspector General, Construction Supervisor, and Lead Architect, have their areas of expertise, but when it comes to the technical approval of specific construction materials and methods, the Engineer of Record is the appropriate authority.