In wood frame buildings, the structure itself serves as what?

In wood frame buildings, the structure itself primarily serves as a source of fuel. Wood is a combustible material, and in the event of a fire, it contributes to the spread and intensity of the fire. The property of wood to ignite and burn means that it can release heat and produce flames when involved in a fire, which can further fuel the fire, leading to rapid fire growth and spread throughout the structure.

This characteristic is particularly important for firefighters to consider, as the type of materials used in a building's construction can significantly impact their firefighting tactics and strategies. Proper understanding of these dynamics is crucial for assessing risks during a fire incident and planning effective suppression efforts.