Section 805. Ceiling Heights. —
Habitable rooms provided with artificial ventilation have ceiling heights not less than 2.40 meters measured from the floor to the ceiling; Provided, that for buildings of more than one-storey, the minimum ceiling height of the first storey shall be 2.70 meters and that for the second storey 2.40 meters and succeeding storeys shall have an unobstructed typical head-room clearance of not less than 2.10 meters above the finished floor. Above stated rooms with a natural ventilation shall have ceiling height not less than 2.70 meters.
Mezzanine floors shall have a clear ceiling height not less than 1.80 meters above and below it.