What should be the first step in assessing a collapsed structure?

Conducting an initial size-up is crucial in assessing a collapsed structure. This step allows responders to evaluate the scene for potential hazards such as unstable debris, utilities that may pose risks (like gas leaks or electrical hazards), and environmental dangers like fires or hazardous materials. By performing a thorough size-up, responders can gather essential information about the complexity of the scene, including the layout of the structure and the location of any visible victims. This comprehensive assessment is vital to developing an effective and safe rescue plan, prioritizing responder safety and ensuring that assistance is targeted appropriately.

This approach ultimately lays the groundwork for all subsequent actions, from setting up a safe perimeter to determining rescue strategies, making it the most critical first step in dealing with a collapsed structure.