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12.4.7 Projection Rooms
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Where cellulose nitrate film is used, the projection room shall comply with NFPA 40.
Film or video projectors or spotlights utilizing light sources that produce particulate matter or toxic gases, or light sources that produce hazardous radiation, without protective shielding shall be located within a projection room complying with 126.96.36.199.2.
Every projection room shall be of permanent construction consistent with the building construction type in which the projection room is located and shall comply with the following:
- Openings shall not be required to be protected.
- The room shall have a floor area of not less than 80 ft2 (7.4 m2) for a single machine and not less than 40 ft2 (3.7 m2) for each additional machine.
- Each motion picture projector, floodlight, spotlight, or similar piece of equipment shall have a clear working space of not less than 30 in. (760 mm) on each side and at its rear, but only one such space shall be required between adjacent projectors.
The projection room and the rooms appurtenant to it shall have a ceiling height of not less than 7 ft 6 in. (2285 mm).
Each projection room shall be provided with adequate air supply inlets arranged to provide well-distributed air throughout the room.
Air inlet ducts shall provide an amount of air equivalent to the amount of air being exhausted by projection equipment.
Air shall be permitted to be taken from the outside; from adjacent spaces within the building, provided that the volume and infiltration rate is sufficient; or from the building air-conditioning system, provided that it is arranged to supply sufficient air whether or not other systems are in operation.
The lamp exhaust system shall be positively interconnected with the lamp so that the lamp cannot operate unless there is sufficient airflow required for the lamp.
Exhaust air ducts shall terminate at the exterior of the building in such a location that the exhaust air cannot be readily recirculated into any air supply system.
The projection room ventilation system shall be permitted also to serve appurtenant rooms, such as the generator room and the rewind room.
Each projection machine shall be provided with an exhaust duct that draws air from each lamp and exhausts it directly to the outside of the building.
The lamp exhaust shall be permitted to exhaust air from the projection room to provide room air circulation.
The lamp exhaust system shall exhaust not less than 300 ft3/min (0.14 m3/s) per lamp, or not less than the exhaust volume required or recommended by the equipment manufacturer, whichever is greater.
Miscellaneous equipment and storage shall be protected as follows:
- Each projection room shall be provided with rewind and film storage facilities.
- Flammable liquids containers shall be permitted in projection rooms, provided that all of the following criteria are met:
- There are not more than four containers per projection room.
- No container has a capacity exceeding 16 oz (0.5 L).
- The containers are of a nonbreakable type.
- Appurtenant electrical equipment, such as rheostats, transformers, and generators, shall be permitted to be located within the booth or in a separate room of equivalent construction.
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