A) What are the author's main points (hypothesis)?
Structural collapse of any part of a building (floors, walls, ceilings, roofs, or structural members) during fire fighting is a leading cause of death of fire fighters.
B) What arguments did the author use to support his or her hypothesis?
The potential for structural collapse is one of the most difficult factors to predict during initial size-up and ongoing fire fighting. Structural collapse usually occurs without warning. For example, the floor of a burning structure may suddenly collapse, spilling fire fighters into a burning inferno. (Loflin 1996) Or a sudden roof collapse may trap ...