When they don't have a choice, they do. The whole point of a structural collapse is the removal of resistance. An intact building had 1 g of resistance. The structural failure had 0.3 g of resistance. Where else was there to collapse? Spilling down outside of the walls of the lower building? Kind of impossible if the upper structural elements were still intact. Yeah, you tell me what the other path was. I'm waiting.
When they don't have a choice, they do. The whole point of a structural collapse is the removal of resistance. An intact building had 1 g of resistance. The structural failure had 0.3 g of resistance. Where else was there to collapse? Spilling down outside of the walls of the lower building? Kind of impossible if the upper structural elements were still intact. Yeah, you tell me what the other path was. I'm waiting.