What occurred at the triangle shirtwaist factory in 1911 that caused new york and other states to pass safety laws to protect factory workers?

nearly 150 workers died when a poorly constructed floor gave way under heavy machinery.

many workers collapsed and some died when overcome by chemical fumes in an unventilated dyeing room.

several children were caught in a weaving machine and crushed to death.

nearly 150 workers died, trapped behind locked doors, when a factory caught fire.