Abstract: Employee #1 and a coworker were welding steel hangers at a construction site. Because of poor weather, they were welding inside an 8 ft by 8 ft by 20 ft long steel container with one end left open for ventilation. When a foreman observed the situation, he told them to stop and set up a shelter with more ventilation. The coworker, who was doing the actual welding, ignored the foreman's instructions and they continued welding inside the container. The fumes built up until Employee #1 collapsed, complaining of chest pains and difficulty breathing. He was transported to the hospital, where he was treated for chemical burns to his lungs and respiratory system. Employee #1, a temporary agency worker contracted out to a metal fabricator as a welder, had received no training from the agency that hired him.