When using an air chisel to cut the roof of a vehicle on its side, what is the first step?

Making a hole near the top corner on one side of the vehicle is the appropriate first step when using an air chisel to cut the roof of a vehicle that is on its side. This initial cut is important because it serves multiple purposes: it allows for the release of pressure created by potential entrapment in the vehicle, and provides a clear view and access point for further cutting.

By starting at the top corner, rescuers can ensure that they have a safe entry point to begin the process of removing the roof, while also maintaining control over the situation. This technique helps to minimize the risk of further injury to any occupants inside, as it allows for better visibility and accessibility for rescuers to assess and assist victims effectively.

Subsequent cuts can then be made based on the initial opening created, facilitating the complete removal of the roof as needed, while a horizontal cut near the bottom could potentially lead to complications, such as failing to provide enough structural support during the operation. Making a vertical cut in the center or a circular cut on top may not provide the most effective access and could also complicate the rescue process.