I am working on a building that has multiple floors that are completely stripped and wide open for new tenants to design the layout to. I am not sure if this is correct but I have calculated out the number of occupants according the to the total floor area and the ASHRAE 62.1 office space standards. As for entering critical zones in I do not know what to do. There are no walls and the whole floor is completely open. I would appreciate any assistance. Thank you.