Steam boilers shall be located outside of the buildings, either under the sidewalk or in an extension, but in no case under or within any portion of the building, and the space allotted to the same shall be inclosed by walls of brick or concrete at least 12 inches thick on all sides, and the ceiling of such space shall be constructed of fireproof materials. Each doorway in said walls connecting with the building shall have an automatic fire door.
All blowers used to circulate air. through heating or ventilating pipes with openings to the auditorium shall be provided with a device to stop the blower automatically in case of fire. Fusible links for this purpose shall be located near the blower, both inside and outside the pipe leading to openings in the auditorium.
No coil, radiator or pipe shall be placed so as to obstruct any aisle or passageway. Any exposed radiator or coil shall be guarded.
The stage section and every portion of the building devoted to the uses or accommodation of the public, also all passages leading to streets, including the open courts and corridors shall be satisfactorily lighted during every performance and until the entire audience has left the premises.
Only electric light shall be used in the auditorium and stage section, except that gas fixtures having not larger than "one foot" burners may be used in dressing rooms. These shall have soldered to the fixture strong 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.
Where electric current from two separate street mains is available, two separate and distinct services must be installed; one service to be of sufficient capacity to supply current for the entire equipment of the theatre, while the other service must be at least sufficient to supply current for all emergency lights, including the exit lights or signs, and all lights in outside courts, lobbies, stairways, corridors and other portions of the theatre which are normally kept lighted during the performance. Where only one supply from a street main is available the connection used exclusively for emergency lights must be taken from a point on the street side of the main service fuses. When the source of supply is an isolated plant on the same premises an auxiliary service at least sufficient to supply all emergency lights shall be connected with some outside source, or a suitable storage battery within the premises may be considered the equivalent of such service.
Where illuminated signs are not provided there shall be at least one red light over each exit and entrance opening from the auditorium and stage sections.
All "emergency lights" shall be controlled by a special switch located in the lobby and accessible only) to authorized persons.
The stage switchboard shall have a metal hood over the top, running the full length of the board and fully protecting same from anything falling from above.
A standard wet-pipe system of approved automatic sprinklers shall be installed throughout the theatre, except in the auditorium, foyers and lobbies. Sprinklers will not be permitted over dynamos and switchboards or above the fusible links immediately under the automatic ventilators over stage.
There should be at least two independent water supplies to the automatic sprinklers. The following are approved sources of water supplies:
The system to give not less than 25 pounds static pressure at all hours of the day at highest line of sprinklers.
The tank shall be located approximately at the level of the highest line of sprinklers. The total capacity shall be not less than 5,000 gallons (3,300 gallons of water), and in any event the tank or tanks shall contain sufficient water to supply 25 per cent of the greatest number of sprinklers with an "area" for twenty minutes with an average discharge of twenty gallons per minute per sprinkler.
A gravity tank shall contain an available quantity of water sufficient to supply 50 per cent of the number of sprinklers in one "area," to which it gives protection, for 20 minutes, with an average discharge per sprinkler of 20 gallons per minute, but tank shall not be less than 5,000 gallons available capacity.
Elevation of bottom of tank above highest line of sprinklers on system which it supplies shall be not less than 20 feet.
Fire pump of not less than 500 gallons capacity per minute, and sufficient to supply 50 per cent of the number of sprinklers within an "area" with an average discharge per sprinkler of 20 gallons a minute. The pump is to be so located on premises as to be free from damage by fire or other causes. The pump room shall be readily accessible and easy of safe egress for attendant. Water shall be taken from an approved source, having sufficient capacity to supply pump for not less than 60 minutes, while pump is delivering its rated capacity. A surge tank of not less than 5,000 gallons capacity shall be provided when the supply from the street main is not sufficient. Power to drive pump, whether steam or electricity, shall be constant and properly safeguarded.
In addition to two of the above required supplies there shall be an approved Siamese Fire Department connection not less than 4 inches in diameter, placed on the outside of the building at each street front, installed in accordance with the requirements of the Fire Department and with suitable metal plate with raised letters securely attached to the wall near the connection reading "Automatic Sprinklers.".