What fundamental fire concern is associated with Type III construction?

Type III construction, also known as "ordinary construction," is characterized by its use of both non-combustible materials and combustible elements, typically involving masonry or steel frames with wood components. A significant concern with this type of construction is the presence of concealed combustible spaces, which can allow fire to spread undetected through walls, ceilings, and other areas that are not easily accessible. These concealed spaces can trap heat and smoke, making it difficult for firefighters to locate and extinguish a fire effectively.

Understanding this concern is crucial for fire suppression strategies and for assessing the potential risks associated with buildings constructed using this method. It highlights the importance of thorough inspections and firefighting tactics that consider the potential for hidden fire growth within these concealed areas. Other construction types may address the issue of combustibility differently, but in Type III construction, these concealed spaces present a unique challenge that can significantly impact fire behavior and safety.