One firefighter was treated for minor burns in the incident, according to a WMUR report (http://bit.ly/Lj29iT). There were several partial collapses at the seven-unit, multi-family building. Chief James Burkush told reporters the wooden structure was more than 100 years old.
About seven minutes after firefighters' initial attack, a flashover occurred in the attic, causing the ceiling to collapse and trapping several members. Firefighters who were not trapped were able to free their colleagues from the debris. Officials said the fire had been burning for nearly an hour before it was reported.
For more on structural collapse, consider Construction Concerns for Firefighters: Structural Collapse, Part II and Construction Concerns for Firefighters: Structural Collapse. For more on the phenomenon of flashover, consider Flashover Survival and FLASHOVER RISK MANAGEMENT.
Learn more about this incident and watch video at http://bit.ly/Lj29iT.