Here in sunny Winnipeg Centre the all mighty ShiftLogic rostering software is in use. There ain't no logic to it, to be sure. It looks at when bums are needed on seats and rosters accordingly. The mandatory 10 hours between shifts is envoked regularly and IMHO doesn't take fatigue into consideration for one second.
For example, my schedule form 2 cycles ago was
1515 - 0015
13-45 - 2245
0900 - 1800
0645 - 1400 (with the 10 hours then)
0000 - 0730
This week, I've got 4 x 1515 - 0015 and a 1230 - 2045. Go figure.
But there ain't no way on this planet I would do Mon - Fri 9 - 5. THAT causes fatigue (and is way to organised)