Which of the following is a listed collapse type?

• A. Vee-Shaped
• B. Lean-to
• C. Pancake
• D. Dome

Answer: (A)

Understanding collapse patterns and how they guide safety decisions is essential. In this training, a listed collapse type refers to the standard patterns used to describe how structures fail. The Vee-Shaped collapse is listed because it describes a distinct failure where the upper portion loses support on both sides, creating two spreading legs that form a V. This pattern signals loss of multiple load paths and a high risk of sudden, unstable movement, which informs you to keep clear of the center and treat the area as unsafe. The other shapes describe real collapse geometries but aren’t part of the official listed patterns in this exam’s framework. Recognizing the Vee-Shaped pattern helps you anticipate instability and plan safer actions.