What action should a special inspector take if they find a serious safety violation?

When a special inspector identifies a serious safety violation, the most appropriate action to take is to stop work and notify the building official. This step is crucial because serious safety violations can pose immediate hazards not only to the workers on site but also to the integrity of the structure being built and the safety of the public. Stopping work ensures that no further unsafe actions take place while the violation is being addressed.

Notifying the building official is essential since they have the authority to evaluate the situation and take necessary corrective measures. This action helps ensure compliance with safety standards and regulations, thereby maintaining a safe working environment.

Continuing with the inspection without addressing the violation, as suggested in one of the other choices, fails to prioritize safety and could lead to further risks. Similarly, simply notifying the contractor without taking further action does not resolve the violation or protect the safety of workers. Waiting for a scheduled meeting to discuss the issue is also inappropriate as it delays necessary actions that should be taken immediately. Thus, stopping work and alerting the building official is the correct and most responsible course of action in such situations.