Structural collapse can be caused by damage from which forces?

• A. Fire only
• B. Snow only
• C. Water only
• D. Fire, Snow, Wind, or Water

Answer: (D)

Structural collapse can result from multiple damaging forces, not just one. Heat from fire weakens structural members and connections, making it easier for the building to fail as temperatures rise and materials lose strength. Heavy snow adds substantial live load to roofs, potentially exceeding design capacity and causing a roof or supported floors to fail. Wind imposes lateral and uplift forces that can stress walls, fasteners, and roof systems, especially if connections have already been compromised. Water intrusion and saturation can undermine materials, promote rot and corrosion, and even undermine foundations or basements. Because any of these forces can cause failure on its own, and often act together in real scenarios, the comprehensive answer is that fire, snow, wind, or water can all lead to structural collapse.