When are alternative design fasteners permitted in the work?

Alternative design fasteners are permitted in a project primarily when the Engineer of Record approves them. This requirement ensures that any deviations from standard fasteners have been evaluated for their structural integrity, safety, and suitability for the specific application in the construction project. The Engineer of Record is responsible for the overall design and compliance with building codes and standards, so their approval is critical to maintain compliance and ensure the safety and performance of the structure.

While other options might seem reasonable, they don't carry the same authoritative level in the context of construction practices. A licensed professional's design alone does not guarantee the fasteners are appropriate for installation without the Engineer of Record's approval. Similarly, specifying fasteners in contract documents or having a certification from a manufacturer might set the groundwork for their use, but the final endorsement from the Engineer of Record is the ultimate validation that allows for their use within the project.