Which construction type may contain concealed spaces that can spread fires?

Type III construction is characterized by external walls made of non-combustible materials but may have concealed spaces within the structure. These concealed spaces can be found in the voids created by wall cavities, floors, and roofs, allowing fire to travel undetected through the building.

In a Type III construction, while the exterior may offer some fire resistance, the interior can hold combustible materials that pose a significant risk in the event of a fire. As the fire spreads within these concealed spaces, it can quickly become unmanageable, making it crucial for incident safety officers to assess and understand these risks when managing fire safety in such buildings. This factor is particularly important during firefighting efforts, as fire may not be immediately visible but can still pose a serious threat through hidden pathways.

Understanding the characteristics of construction types helps safety officers to implement appropriate fire prevention strategies and ensure effective emergency response protocols.