Section 37(3) in The Tamil Nadu Cinemas (Regulation) Rules, 1957
(3)The width of all staircases and the number of steps in each, the width of corridors, gangways and doorways together with the height of any galleries or tiers in such premises and in any of the erections or buildings in connection therewith as are more than one tier in height shall be indicated on such drawings, as well as the floor and roof ventilation and the details of any intended gas or electric installation. The thickness of the walls and scantlings of the various materials used shall be clearly shown on such drawings by figured dimensions.
