Which type of construction is often considered less stable in a fire situation?

Type III construction is often considered less stable in a fire situation primarily due to its reliance on wood as the main structural component. This construction type typically features exterior walls made of noncombustible materials, but the interior framing is largely composed of lightweight wood, which can ignite and contribute to rapid fire spread. Additionally, the assembly of Type III structures often includes voids and spaces where fire can easily propagate unnoticed until it becomes apparent.

Firefighters need to be particularly cautious with Type III construction, as it can fail more quickly than other types due to the combustible nature of its materials. Understanding the characteristics of each type of construction helps in assessing safety hazards and planning effective fire attack strategies, emphasizing why Type III is highlighted as less stable in fire conditions.