What is the primary responsibility of the first arriving truck company at a high-rise incident?

The primary responsibility of the first arriving truck company at a high-rise incident is to provide ventilation support. In high-rise fires, effective ventilation is crucial for controlling heat and smoke, facilitating the movement of firefighters, and ensuring clearer pathways for search and rescue operations. By venting smoke and heat, the truck company can help to improve visibility and reduce the potential for rapid fire spread, which is particularly important in a tall building where conditions can deteriorate swiftly. This action is foundational because it directly impacts the safety and effectiveness of subsequent firefighting efforts and rescue operations.

While other duties such as establishing a Medical Branch, commanding incident operations, and deploying fire hoses are also vital in the overall operation, they typically come into play after the immediate need for ventilation has been addressed in the unique context of a high-rise fire scenario.