What is one reason for structural failure during a fire?

High fuel loads contribute significantly to structural failure during a fire due to the increased intensity and duration of the fire. When there is a large amount of combustible material present, it provides more fuel for the fire, which can lead to faster temperature rises and more severe burning conditions. As the fire consumes the available fuel, it can reach temperatures that exceed the structural integrity limits of building materials, such as wood and steel. Structural components can weaken and ultimately fail when they are exposed to extreme heat, potentially leading to collapse.

In comparison, low room temperatures, excessive egress routes, and frequent inspections do not typically contribute to structural compromise. Low temperatures may not provide sufficient conditions for significant fire growth. Excessive egress routes are designed to improve safety during a fire event, and frequent inspections aim to ensure that a structure's safety measures are maintained. Therefore, these factors are not associated with the increased risk of structural failure as high fuel loads are.