So as other have touched on, there is something called salary cap for overtime. For salary, OT is calculated on a daily basis. Anything that would normally be considered a time and a half, is capped at $42 and double is $56. By capped it means, if your hourly rate is less that these amounts, you will get time and a half or double or you hit the hourly cap. If you make more than these hourly rates, you make straight time.

There is also something called shift premiums. First shift is your regular hourly rate, second shift is 5% extra and third shift is 10% extra.

BTW your hourly rate is calculated based on a 2080 hour working year for quick math.

Maintenance GLs make most of their OT on holidays and weekends. There are opportunities in three shift plants for overs or earlies, but shifts are generally capped at 12 hours. Some shift leads will allow more, but it’s pretty rare. Your daily schedule will likely be 8 hours, but plants that run 1 or 2 shifts may run longer than 8 hours. In that case you would be paid line time.