What is the primary function of the Aerial Overload Alarm?

The primary function of the Aerial Overload Alarm is to activate a visual and audible alert when the load capacity of the aerial apparatus is reached. This is crucial for ensuring safety during operations, as it prevents the aerial device from being used in a manner that exceeds its designed weight limits. By providing these alerts, it allows operators to be immediately aware of the current loading conditions, ensuring that they can take appropriate action to avoid potential accidents or structural failures.

This function is vital in high-stress emergency situations where rapid decision-making is essential, emphasizing the importance of maintaining safe operational practices with aerial apparatuses. The alarm serves as a safeguard, promoting awareness and caution among personnel working with the equipment.

Considering the other options, while restricting ladder operations and measuring ladder height are important aspects of overall aerial safety and functionality, they do not directly pertain to the specific role of an overload alarm. Similarly, adjusting the ladder's angle is related to the operational performance but does not encompass the alert mechanism that triggers at load capacity, distinguishing the alarm's primary purpose clearly from these functions.