According to the AISC Steel Construction Manual, what is the minimum washer thickness for a 1 inch diameter base plate anchor rod?

The correct answer indicates that the minimum washer thickness for a 1 inch diameter base plate anchor rod is 3/8 inch, which is specified in the AISC Steel Construction Manual. This minimum thickness is essential for ensuring the structural integrity and load distribution across the surface where the anchor rod makes contact with the base plate. A washer that meets this minimum thickness aids in distributing the load more evenly and helps to prevent crushing of the base plate material under the rod's head, particularly when subjected to various forces.

Additionally, using a washer of adequate thickness is crucial for ensuring that the bolt remains effective over time, especially under dynamic or fluctuating loads. By adhering to the guidelines set forth by AISC, engineers and construction professionals can maintain safety and compliance with industry standards.