In a __________ collapse, the victims are easily accessible and trapped by surface debris, loads are minimal and easily removed by rescuers, and the threat of secondary collapse is minimal.

The situation described in the question refers to a scenario where victims are trapped but still have a manageable environment for rescue operations. In this type of collapse, the presence of surface debris is limited, allowing rescuers to access victims relatively easily. The loads that may be acting on the victims are minimal, indicating that they are not heavily pinned or crushed by substantial weight, which simplifies the rescue effort. Additionally, the risk of a secondary collapse is low, making it safer for rescuers to operate without facing further danger from the structure.

The term "basic/surface collapse" encapsulates these characteristics effectively, highlighting the simplicity of the rescue conditions. Rescuers can work quickly and efficiently in this type of situation, which is critical in saving lives.

In contrast, in other types of collapses, such as heavy or even moderate collapses, the environment can be more complex and hazardous, often involving significant weight that complicates rescues and increases the risk of further collapses or injuries during rescue efforts.