At a sawmill, a fire broke out. It had originated in the vacuum system which picks up sawdust from the various woodworking machines and carries it to a large silo outside the building. Firefighters put out this fire. Then two workers were instructed to watch the silo for any sign of fire in the system. The two workers entered the silo because the weather was cold outside. Once inside, they found a smoldering rag in one of the intake ducts within the silo. One worker knocked down the rag and an explosion resulted. That worker was overcome by smoke and fire […]