Before shoring operations on a railcar resting on its roof, rescuers should first:

In the context of conducting shoring operations on a railcar that is resting on its roof, securing the railcar is a crucial first step to ensure the safety of the rescuers and the stability of the vehicle throughout the operation. Tying off the railcar with webbing or chains is essential because it provides an initial measure of stabilization, preventing any unintended movement that could jeopardize the safety of personnel involved in the rescue efforts.

This step acts as a preparatory action that allows rescuers to proceed with further stabilization measures, such as cribbing or using pneumatic airbags. By securing the railcar first, rescuers can confidently assess the situation, knowing that the railcar will remain in place while they implement more complicated shoring techniques. The act of tying off the railcar also helps to manage potential hazards should the railcar shift during the rescue operation.

Furthermore, heavy construction equipment or airbags can be useful later in the process, but they are not the first action to take. The priority should always be to secure the railcar to reduce risk during the rescue phase. Hence, the correct action before initiating shoring operations is to tie off the railcar, ensuring a stable and controlled environment for the rescuers.