What is one expected action of firefighters when encountering large structures?

In the context of firefighting operations, when responding to large structures, one expected action involves ensuring that any covers or protective measures are adequately secured and watertight. This is crucial in maintaining the integrity of the firefighting efforts, particularly in preventing water flow from compromising structural elements and to mitigate potential hazards. Ensuring that covers are spliced with watertight joints is a critical detail that can affect the overall effectiveness of firefighting operations in large buildings.

While other actions may also be relevant depending on the situation, such as using larger hoses for increased water flow or coordinating with other units for efficient response, the focus on watertight joints particularly emphasizes the importance of tactics that directly address the structural challenges posed by large buildings. This reflects an understanding of the complexities involved in firefighting within expansive areas requiring specialized equipment and techniques.