Which structure type may necessitate a defensive strategy due to inherent risks?

Lightweight or Bowstring truss construction is associated with certain risks that can make a defensive strategy necessary. These structures, while advantageous for their span and aesthetic qualities, often utilize materials that may have lower inherent fire resistance compared to heavier, more robust construction types. Additionally, the design of these structures can lead to vulnerabilities during extreme weather events or dynamic loads, such as those resulting from seismic activity.

Due to these factors, a defensive strategy becomes vital to mitigate potential failures or damage that could arise from such inherent risks. This approach may include implementing enhanced safety measures, rigorous inspections, or even retrofitting to bolster the structural integrity against these specific vulnerabilities.

In contrast, other construction types mentioned, such as reinforced concrete or masonry buildings with modern reinforcements, typically benefit from enhanced durability and resilience, reducing the need for a defensive strategy. Wooden-framed houses can also present risks but generally have established methods for fire and weather resistance. However, the lightweight truss construction uniquely demands more proactive planning and strategies to address its particular challenges.