What should be done if excessive irregularities are found on the SFRM test surface during thickness testing?

The response indicating that the thickness gauge should be repositioned to a more uniform area is appropriate because accurate measurements are crucial in any testing scenario, especially in the context of Structural Fire Resistance Materials (SFRM) applications. When excessive irregularities are present on the surface being tested, the readings obtained might not reflect the actual thickness of the fireproofing material. This could lead to miscalculations regarding the material's ability to provide adequate protection under fire conditions.

By moving the thickness gauge to a more uniform area, the integrity of the measurement is preserved, allowing for a reliable assessment of the fireproofing layer. This approach ensures that the performance characteristics of the material are evaluated accurately, which is essential for compliance with building codes and to maintain overall structural integrity during a fire event.

In contrast, continuing the test without addressing the issue could lead to inaccurate data and potential safety risks. Removing irregularities might not always be practical or feasible, and employing a different testing method could complicate the situation if the original method is standard for the project. Therefore, finding a more suitable measurement location is the best course of action in the event of surface irregularities.