Par. 1. - There shall be one or more ventilators near the center, and above the highest part of the stage of every theatre, of a combined area of opening satisfactory to the commissioner, and not less than one tenth of the area of the undivided floor space behind the curtain at the stage floor level. The openings in every such ventilator shall be closed by valves or louvres so counterbalanced as to open automatically, which shall be kept closed, when not in use, by a fusible link and cord reaching to the prompter's desk, and readily operated therefrom. Such cord shall be of combustible material, and so arranged that if it is severed the ventilator will open automatically.

Skylight Coverings for Ventilator

Par. 2. - Skylight coverings for ventilators shall have sheet metal frames set with double-thick glass, each pane thereof measuring not less than three hundred square inches, or shall be protected with wire glass. If wire glass is not used, a suitable wire netting shall be placed immediately beneath the glass, but above the ventilator openings. Illuminating fixtures over the auditorium shall be suspended and secured in a manner approved by the commissioner.

Illuminating Fixtures over Auditorium

Par. 3. - Glass on illuminating fixtures over the auditorium shall be secured from danger of falling as the commissioner shall require, but in no case shall any glass more than six inches in diameter or length be hung over the auditorium unless protected from falling by a wire netting or similar device satisfactory to the commissioner.