Which aspect of a structure is examined during a Fire Marshal’s investigation of the interior?

In a Fire Marshal’s investigation of the interior of a structure, examining smoke damage is crucial. Smoke damage can provide significant insights into the origin and progression of a fire. By assessing the pattern and extent of smoke damage, investigators can ascertain the fire's path, its point of origin, and factors that contributed to its behavior and severity.

Understanding smoke damage can also help in determining the types of materials that burned and how the fire affected the overall condition of the interior, informing decisions about safety and potential hazards. For example, the coloration and density of smoke stains can indicate the nature of the fuels involved.

While other aspects such as structural integrity, electrical systems, and occupant history are important in a comprehensive fire investigation, smoke damage specifically relates directly to the aftermath of the fire, making it a vital aspect during the interior examination phase.