All gas or electric lights in the halls, corridors, lobby or any other part of said buildings used by the audience, except the auditorium, must be controlled by a separate shut-off, located in the lobby and controlled only in that particular place.
Gas mains supplying the building shall have independent connections for the auditorium and the stage, and provision shall be made for shutting off the gas from the outside of the building.
All suspended or bracket lights surrounded by glass in the auditorium, or in any part of the building devoted to the public shall be provided with proper wire netting underneath. All lights in passages and corridors in said buildings, wherever deemed necessary by the superintendent of buildings, shall be protected with proper wire network.
All stage lights shall have strong metal wire guards or screens, not less than 10 inches in diameter, so constructed that any material in contact therewith shall be out of reach of the flames of said stage lights, and must be soldered to the fixture in all cases. The footlights, in addition to the wire network, shall be protected with a strong wire guard and chain, placed not less than 2 feet distant from said footlights, and the trough containing them shall be formed of and surrounded by fireproof materials. All border lights shall be constructed according to the best known methods, subject to the approval of the superintendent of buildings, arid shall be suspended for 10 feet by wire rope.
All ducts or shafts used for conducting heated air from the main chandelier, or from any other light or lights, shall be constructed of metal and made double, with an air space between.
Every theatre accommodating 300 persons shall have at least 2 exits; when accommodating 500 persons, at least 3 such exits shall be provided; these exits not* referring to or including the exits to the open court at the side of the theatre. Every such building shall have at least one front on the street, and in such front there shall be suitable means of entrance and exit for the audience, not less than 25 feet in width. The entrance of the main front of the building shall be not on a higher level from the sidewalk than 4 steps, unless approved by the superintendent of buildings. Each exit shall be at least 5 feet in width in the clear and provided with doors of iron or wood; if of wood, the doors shall be constructed as hereinbefore prescribed in this chapter. All of said doors shall open outwardly, and shall be fastened with movable bolts, the bolts to be kept drawn during performances.
In addition to the aforesaid entrances and exits on the street, there shall be reserved for service in case of an emergency an open court or space in the rear and on the side not bordering on the street, where said building is located on a corner lot; and in the rear and on both sides of said building, where there is but one frontage on the street as hereinafter provided. The width of such open court or courts shall be not less than 10 feet where the seating capacity is not over 1,000 people, above 1,000 and not more than 1,800 people 12 feet in width, and above 1,800 people 14 feet width. Said open court or courts shall extend the full length and height of the building and across on each side and rear thereof where its sides or side does not abut on a street or alley, and shall be of the same width at all points, and exits hereafter specified shall lead into such open courts. From the auditorium opening into the said open courts or on the side street, there shall be not less than 2 exits on each side in each tier from and including the parquet and each gallery. The said open courts and corridors shall not be used for storage purposes, or for any purposes whatsoever, except for exit and entrance from and to the auditorium and stage, and must be kept free and clear during performances.
Doorways of exit or entrance for the use of the public shall be not less than 5 feet in width, and for every additional 100 persons or portions thereof to be accommodated in excess of 500, an aggregate of 20 inches additional exit width must be allowed. All doors of exit or entrance shall open outwardly and be hung to swing in such a manner as not to become an obstruction in a passage or corridor, and no such doors shall be closed and locked during any representation, or when the building is open to the public.
The foyers, lobbies, corridors, passages and rooms for the use of the audience, not including aisles spaced between seats, shall on the first or main floor, where the seating capacity exceeds 500 or more, be at least 16 feet clear, back of the last row of seats and on each balcony or gallery at least 12 feet clear of the last row of seats. The level of said corridors at the front entrance to the building shall be not greater than one step above the level of the sidewalk where they begin at the street entrance. During the performance the doors or gates in the corridors shall be kept open by proper fastenings; at other times they may be closed and fastened by movable bolts or blocks.
All aisles on the respective floors of the auditorium shall be not less than 3 feet wide where they begin, and shall be increased in width toward the exits in a ratio of 1 1/2 inches to 5 running feet.