Heavy building collapse is described as which statement?

• A. Basic- Victims easily accessible and trapped by surface debris
• B. Light- Light-frame partition collapse
• C. Moderate- Ordinary construction collapse with load-bearing entrapment. Watch out for secondary collapse
• D. Heavy- Stressed concrete, reinforced concrete, and steel girders impede access

Answer: (D)

In collapse severity classifications, the heavy category describes scenes where large, load-bearing structural elements dominate and physically block access. Heavy building collapse involves materials like stressed concrete, reinforced concrete, and steel girders that impede entry and create unstable conditions, making rescue operations highly challenging and increasing the risk of secondary collapse. This description captures the reality that access is severely restricted by substantial structural members, requiring stabilization and specialized techniques before any search and rescue can safely proceed.

The other descriptions correspond to less obstructed scenarios: basic collapse implies victims are easily reachable through surface debris, light collapse involves non-load-bearing or lightweight components like partitions, and moderate collapse refers to ordinary construction with some load-bearing entrapment and a potential for secondary collapse, but without the pervasive blocking presence of heavy structural members.