On March 25, 1911, a fire at the Triangle Shirtwaist Factory on New York City‘s East Side killed 146 young immigrant workers. The building, which was ten stories high, was overcrowded and filled with flammable material. Many of its fire exits were locked. Protests after the fire led New York State to revamp laws governing working conditions, increase the number of fire inspectors, and write new fire safety codes.
National Archives, General Records of the Department of Labor (174-G-22-50A)