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Every paint-mixing room, paint-spraying room and every room containing a japanning dip tank, vat or japanning oven located in any building other than a building of Type IA, IB or IC construction which is also equipped throughout with a standard system of automatic sprinklers, shall be constructed in accordance with the requirements of this section. Any such room, with a floor area of not more than 600 square feet, shall have a floor of any type of construction permitted for the building in which located and shall have both walls and ceiling of one-hour fire-resistive construction. Any such room, with a floor area of more than 600 square feet and not more than 1,200 square feet, may have a floor of any type of construction permitted for the building in which located, and shall have both walls and ceiling of two-hour fire-resistive construction. Any such room with a floor area of more than 1,200 feet, shall be separated from every other part of the building by not less than four-hour fire-resistive construction. No such rooms shall have any opening except a doorway or doorways between such room and any part of the building. Every doorway through any such wall or separation shall be provided with a door of the character required by Chapter 15-12 for fire doors. Nothing in this section shall be constructed as prohibiting or preventing the installation of noncombustible piping or conveyors or similar dust-tight enclosed mechanical devices between floors or stories in such rooms or buildings.
(Prior code § 129.1-49)