What is a Cantilever Collapse?

A cantilever collapse refers to a specific structural failure that occurs in multistory buildings, where one or more walls fail, resulting in the upper floors being supported only by the remaining walls. This type of collapse does not consist of an entire structure falling down all at once; rather, it typically manifests when the integrity of one part of the building is compromised while other parts remain intact for a time.

In such scenarios, the remaining walls can end up bearing the load of the floors above, creating a precarious situation where the building may appear to be partially standing but is at high risk of further failure. Understanding the mechanics and implications of this type of collapse is crucial for rescue operations and building safety assessments, as it can inform first responders about potential hazards and the need for careful navigation around the compromised structure.

Other scenarios discussed—like the collapse of a single wall in a cottage, a building that tilts without fully collapsing, or a controlled demolition—do not accurately represent the unique characteristics of a cantilever collapse. Each of those options describes different situations that lack the specific attributes associated with how multistory structures can behave under stress during a cantilever collapse.