Where I work we set our tasks on a project schedule based on a duration of shifts not days. I am trying to figure out how to get this to work and to reflect proper time frames for follow on work as the schedule code is changed.

Example:

a 1-0 calendar is one 8 hr shift 7 days a week without regards to holidays
a 1-5 calendar is one 8 hr shift 5 days a week (Mon-Fri) no holidays
a 1-6 calendar is one 8 hr shifts 6 days a week (Mon-Sat) no holidays
a 2-5 calendar is two 8 hr shift 5 days a week (Mon-Fri)
a 2-6 calendar is two 8 hr shifts 6 days a week (Mon-Sat)
a 3-0 calendar is three 8 hr shift 7 days a week without regards to holidays

Thanks in advance for help in solving this issue.