FF2 CHAPTER 16 BUILDING MATERIALS, STRUCTURAL COLLAPSE, AND EFFECTS OF FIRE SUPPRESSION IFSTA

When heated, steel structural members tend to: - Answer- elongate and push walls outward. What should interior crews do first when structural collapse is likely or imminent? - Answer- Exit the building and inform Command When should collapse zones be established? - Answer- When there is an indication that the structure has been weakened by prolonged exposure to fire or heat When should a collapse zone be established at a structure fire? - Answer- Once a defensive strategy is adopted Little or no water runoff from the interior of the structure can be an indicator that: - Answer- the structure is retaining water and at risk of collapse. Which is a true statement about factors that affect fire spread? - Answer- Open floor plans and less compartmentation may contribute to fire spread. What is the primary material used for structural support in the construction of large buildings? - Answer- Steel Contents of a building: - Answer- can cause collapse more rapidly due to added dead weight. Other than fire suppression, which fireground activity can greatly affect a structure's chance of collapse? - Answer- Overhaul How does the size of a wooden structural member affect how it reacts to fire? - Answer- Heavy timbers remain strong even after exposure to direct flame. Cast iron may crack or shatter when it is: - Answer- rapidly cooled with water. In a _____ building, structural collapse is unlikely but will usually be localized instead of st