What should be conducted when performing a Size Up?

Performing a Size Up is a critical step in emergency response, particularly in firefighting, as it involves assessing the situation before taking action. The most effective approach during this process is to conduct a walk around of the building. This allows responders to evaluate the physical conditions of the structure, identify potential hazards, and gather vital information such as fire location, building construction, occupancy, and access points.

This on-site assessment is essential for formulating an effective action plan and ensuring the safety of both the responders and any civilians who may be in the area. Observations made during the walk around can inform critical decisions related to tactics, resource allocation, and overall incident command.

While reviewing previous incidents, conducting team briefings, and performing equipment inspections are important components of overall emergency preparedness and response, they do not provide the immediate and specific situational awareness required for effective Size Up. The walk around provides real-time data that can change the course of action based on the unique circumstances of the current incident.