Andrew Carnegie's steel workers, hours worked per week?

Question

How many hours per week did Andrew Carnegie's steel workers put in on average from 1885 until 1900 when he sold his business?

Answer 1

The Adamson Act of 1916 imposed the eight hour work-day on businesses in the United States, though many businesses had already adopted this practice. In the years between 1885 and 1900 it was common for employees to work from ten to even sixteen hours a day for six days a week. Therefore, an employee at Andrew Carnegie's steel mills could have worked from a minimum of sixty to an unlikely maximum of ninety-six hours. However, because I don't know the specifics for Andrew Carnegie's policies, which may have changed in the fifteen year period between 1885 and 1900, I can't say for certain how many hours a mill worker would have worked in a typical week.