A small, modern five-story office building collapses. What type of collapse is this considered?

In this scenario, a small, modern five-story office building collapsing is characterized as a heavy collapse. This classification considers the overall mass and structure of the building, as well as the implications of a sudden failure. A heavy collapse typically suggests that a significant amount of material has fallen and there is a substantial debris field, posing significant challenges for rescue operations and increasing the risk for any occupants or first responders within or near the structure when the collapse occurs. The modern construction methods also tend to use materials and designs that can withstand a certain degree of stress, making the collapse potentially more dangerous due to the sudden and complete failure of the structure, as opposed to a gradual or partial failure that might occur in lighter structures.