What does a permanent marker serve as in structural settings?

In structural settings, a permanent marker serves primarily as a benchmark. Markers are often used to indicate reference points on structures, allowing inspectors and construction workers to establish consistent measurements and references during inspections, renovations, or installations. This helps ensure that all measurements can be accurately compared and any necessary adjustments can be made easily. Benchmarks are crucial for maintaining structural integrity and adhering to compliance with safety regulations.

While other options may hold some relevance, such as marking specific areas for safety or identification purposes, the primary and most effective use of a permanent marker in such contexts is to create clear benchmarks that facilitate precise inspections and construction processes.