The fire suppression practice of cutting holes in a structure to allow hot gases to escape, thereby preventing these gases from reaching explosive concentrations within the structure. All possible ventilation holes should be verified by the fire service to ensure that they were cut by the firefighter during suppression operations and not before the fire by another party.
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Icove, David J and DeHaan, John D. Forensic Fire Scene Reconstruction. Pearson Prentice Hall. 2004.