Fire Department Incident Safety Officer Practice Test

Which aspect of Type V construction should firefighters be particularly cautious about?

1. Concrete flooring

2. Vegetation around the building

3. Lightweight, combustible assemblies

4. High ceilings

The correct answer is: Lightweight, combustible assemblies

Type V construction, often referred to as wood frame construction, is characterized by its use of lightweight, combustible materials, particularly in the structural framework and assemblies. Firefighters need to be particularly cautious about this aspect because these lightweight materials can fail quickly under fire conditions, leading to rapid structural collapse. The use of engineered wood products, such as laminated veneer lumber, is common in Type V buildings and can weaken significantly when exposed to heat. This presents a critical risk to firefighters, as the integrity of the structure may be compromised faster than with heavier, non-combustible materials found in other construction types. Being aware of the potential for quick failure ensures that firefighters can make informed tactical decisions, maintain adequate safety distances, and establish appropriate strategies for firefighting and rescue operations. Understanding the properties of these combustible assemblies helps in assessing the risks involved in operating in or around Type V structures, thus enhancing overall safety and effectiveness during emergency response operations.