Which type of construction has accounted for more firefighter fatalities?

Light frame construction is the type of construction that has accounted for more firefighter fatalities. This construction type includes materials that are less durable, such as wood trusses and lightweight framing, which can collapse more easily under fire conditions. The lack of structural integrity in light frame buildings during a fire can lead to rapid deterioration and sudden collapses, posing significant risks to firefighters who may be inside or near the structure during a fire incident. Moreover, lightweight materials can also ignite quickly, leading to a faster progression of the fire and increased danger for both occupants and firefighters.

In contrast, ordinary construction, while still posing risks, is made from heavier materials like masonry or wood, which can provide more structural support and are somewhat less prone to abrupt failure compared to light frame construction. Heavy timber construction, known for its large beams and columns, has a certain level of stability and fire resistance that helps prevent the quick collapse seen in lighter materials. Lastly, steel frame construction is generally resilient at high temperatures and can withstand fire longer than light frame buildings, making it less likely to contribute to firefighter fatalities compared to light frame structures.

Therefore, the significant risk factors associated with light frame construction are pivotal in understanding its association with firefighter fatalities during a fire.