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Vertical Ventilation and Firefighting: Inside the UL Tests

By Bobby Halton Fire Engineering Editor in Chief Photos by Tim Olk (olkee.smugmug.com) On February 2, 2012, Fire Engineering had the pleasure of spending Groundhog Day with our good friends at Underwriters Laboratories (UL). The folks at UL have been conducting live fire experiments in order to try to ascertain what the effects of various forms of ventilation tactics have on fire behavior. Aided by a grant from the fire act and working closely with the good folks from the National Institute of Standards and Technology (NIST), experiments have been conducted on positive pressure ventilation and high-rise buildings, floor collapse in various floor configurations, natural ventilation in re...

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