But it does talk about that a studio has limited people in it, not like a museum could have a good crowd not familair with the building
from nfpa 140
A.4.11.1.3.1
A.4.11.1.3.1 Paragraphs 4.11.1.3.1 and 4.11.1.3.2 recognize motion picture and television industry practices that require sets to change constantly and that sets are “temporary” construction not subject to building codes or standards. Solid ceilings that obstruct the stage sprinklers are “flown” (moved) in or out to permit special shooting angles or lighting requirements, often on a scene-by-scene basis. With temporary walls and ceilings, it would be impractical to install a sprinkler system in a constantly changing structure. Therefore, one or more of the following mitigation techniques should be used to compensate for the areas shielded from sprinkler spray by solid or hard ceilings or platforms:
(1)Approved and listed heat detectors or smoke detectors can be installed beneath such solid or hard ceilings in excess of 600 ft2 (55.7 m2) in area and platforms in excess of 600 ft2 (55.7 m2) in area and 3 ft (0.9 m) in height. Detectors should be connected to an approved and listed central, proprietary, or remote station service or to a local alarm that will provide an audible signal (i.e., a bell or horn) at a constantly attended location. The detector system, including the alarm panel, is defined as a portable system because it is intended to be reinstalled when platforms or sets are changed. The detectors that are secured to standard outlet boxes and the listed fire alarm panels can be temporarily supported by sets, platforms, or pedestals. Spacing of detectors should be per manufacturers' requirements.
(2)The ceiling can be positioned to allow for the operation of the building's automatic fire sprinkler system after videotaping, filming, or broadcasting of programs has been completed for the day.
(3)A fire watch should be provided when the set is not in use.
(4)No combustible materials should be stored under any platforms. Consideration should be given to secure such covered areas with screen wire or other materials that will permit visual inspection and emergency access.
(5)Approved/listed fire retardants can be applied beneath combustible platforms.
(6)Approved/listed fire retardants can be applied to scenery, props, framework and deck of combustible platforms, and the hard ceilings of combustible sets.
5.11 Fire Protection.
5.11.1* Building areas used as production locations shall be designed, constructed, and maintained to protect the occupants not intimate with the initial fire development for the time needed to evacuate, relocate, or defend in place.
5.11.2 Where an automatic sprinkler system is provided for compliance with 5.11.1, the automatic sprinkler system shall be installed in accordance with NFPA 13, Standard for the Installation of Sprinkler Systems, unless otherwise provided in 5.11.4 or 5.11.5.
5.11.3 In any production location building protected by an existing automatic sprinkler system, where solid- or hard-ceiling sets or platforms are introduced and create an obstruction to sprinkler discharge, the provisions of 5.11.4 or 5.11.5 shall be met.
5.11.4* The requirements of NFPA 13, Standard for the Installation of Sprinkler Systems, prohibiting obstructions to sprinkler discharge shall not be applicable if approved mitigation is employed.
5.11.5* The requirements of NFPA 13, Standard for the Installation of Sprinkler Systems, prohibiting obstructions to sprinkler discharge shall not be applicable if the building sprinkler system meets the design criteria for Extra Hazard, Group 2.
5.11.6 Automatic sprinkler systems, where provided, shall be maintained in accordance with NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems.
5.11.7 Portable fire extinguishers shall be provided as required by the AHJ.