Adding hours per project based upon multiple people working that is not based on 24 hour format

Adding hours per project based upon multiple people working that is not based on 24 hour format

I would like to assign a project and have it track by total hours that is not limited to the 24 hour/day format.  Example: I have 5 people working on day 1 for 6 hours and I would like to be able to assign 30 hours to the project for that day without having to individually put each person into the project and assigning individual hours to each person.  Currently If the amount of total hours exceeds 24 it will not let you continue the project hour documentation.  The next day the project amount of hours could be 40 based upon each of the 5 operators working 8 hours.  Big Limitation at this time using the project system without putting in alot of time to place each operator into the system individually.