Dormitories shall contain nine to 24 bunks, except direct supervision dormitories which may contain up to 48 bunks. Dormitories shall contain not less than 40 square feet of floor space for the first bunk plus 18 square feet of floor space for each additional bunk. Each dormitory shall have adequate toilets and lavatories. Not more than 40% of the inmate capacity of the facility shall be designed for dormitories.