unless u have told them u can, they cant make u work more than 5 days in a row. Availability is different to actually working, its just the times u are available for work. eg, im available thurs through to sunday, but only work on 2 of those days. There are different rosters for each week, and i think a casual cant work more than 38 hours a week without the worker telling them. BTW, dont think anyone can work over 48 hours in one week. there also has to be 10 hours at least b/w each shift. Eg, if you are closing on a thursday night at 12:30, you cant be rostered on again until 10:30 the next day.