Structural Integrity Assessment of Two-Story Cross-Laminated Timber House Under Fire Load

Fire generates considerable thermal load on building, challenging the sturdiness of load-bearing timber elements. The mechanical characteristics of wood, such as strength and stiffness, undergo significant changes under the influence of heat. As temperature increases, wood degrades in both its superficial integrity and structural properties, compromising the load-bearing capacity of the entire structure. This requires a comprehensive understanding of the effects of fire on timber, embracing both the immediate consequences of direct exposure and the potential residual impact on structural performance. This paper investigates the structural integrity of a two-story house constructed with cross-laminated timber (CLT) panels subjected to simulated fire load. The theoretical framework covers an exploration of fire loads on buildings, the influence of fire on the mechanical properties of wood, and existing standards describing the structural integrity of wood elements under fire conditions. Through a comprehensive analysis, the research aims to clarify the performance of CLT structure during fire event, providing valuable insights for structural engineering. The findings presented herein contribute to the evolving understanding of timber construction resilience in the face of fire hazards, forming future design considerations and enhancing the overall safety of wooden structures in urban environments.