ABC15 reports that "firefighters in Phoenix and across America are dying in accidents that could be prevented." The story reveals that truss -- an inexpensive, cheaply prefabricated element, commonly used in home construction -- tends to cause roofs to collapse when on fire. As firefighters get on roofs to vent a fire, they often fall through and die. This has forced fire departments to change firefighting tactics, which however, leads to "higher property damage and possible loss of life."
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