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ARTICLE VI. PAINT MIXING AND SPRAYING (15-24-550 et seq.)
“Paint mixing room” means a room designed, intended or used for the purpose of mixing paint, varnish, lacquer, enamel or other such volatile or flammable liquid or liquid containing any volatile flammable substance in solution or suspension, during any 24-hour period.
“Paint spraying room” means a room designed, intended or used for the purpose of spraying more than ten gallons of paints, varnish, lacquer, enamel or other such volatile or flammable liquid or liquid containing any volatile flammable substance in solution or suspension during any 24-hour period; without use of an approved spray booth.
“Paint spraying” means the application of flammable or combustible paint, varnish, lacquer, enamel, stain or other such volatile or flammable liquid, or liquid containing any volatile flammable substance in solution or suspension applied as a spray by whatever means, in continuous or intermittent processes, where more than one gallon of such liquid is used in any 24-hour period.
“Spray area” means any area in which dangerous quantities of flammable vapors or combustible residues, dusts or deposits are present due to the operation of spraying processes. The spray area shall include:
(a) The interior of spray booths;
(b) The interior of ducts exhausting from spraying processes;
(c) Any area in the direct path of spray or any area containing dangerous quantities of air- suspended combustible residue, dust, deposits, spray or vapor as a result of spraying operations.
“Spray booth” means a specially designed enclosure constructed of noncombustible materials and otherwise complying with the requirements of this chapter and other applicable sections of this Code, in which paint-spraying operations are carried on.
(Prior code § 129.1-47)
Spraying. Paint-spraying operations shall not be permitted in any institutional building. Paint-spraying operations shall not be permitted in any assembly, school or multiple-dwelling building except in a room designed for the purpose, protected with an approved system of automatic sprinklers and separated vertically and horizontally from other parts of the building by construction having not less than two-hour fire-resistive rating.
(Prior code § 129.1-48)
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)
(Prior code § 129.1-50)
A spray booth shall be required when paint- spraying operations are carried on in any building when using more than one gallon of previously defined liquid in any 24-hour period except in those cases where the physical size of the materials being sprayed, such as in structural steel shop coating and similar operations, makes it impractical to conduct such operations within a spray booth. A paint-spraying room shall be required when the liquids used, as defined in Section 15-24-550, exceed ten gallons in any 24-hour period unless conducted in an approved booth. Nothing in this section shall be construed as prohibiting more than one such spray booth in any paint-mixing room.
(Prior code § 129.1-51)
The construction of a spray booth shall be as follows:
(a) To be constructed of at least 18-gauge steel or equivalent noncombustible material, rigidly supported and specifically designed for its intended use.
(b) The interior surfaces of spray booths shall be smooth and continuous without edges, and otherwise designed to prevent pocketing of residues and facilitate the safe cleaning and washing without injury.
(c) The floor of the spray booth and the operators' working area shall be of noncombustible, nonsparking material of such character as to facilitate the safe cleaning and removal of residues.
(d) Baffle plates shall be of noncombustible materials, readily removable or accessible on both sides for cleaning, and shall be designed to promote an even flow of air through the booth and prevent the deposit of overspray before it enters the exhaust ducts. Such baffle plates shall not be located in the exhaust ducts.
(e) Each spray booth having a frontal area larger than nine square feet shall have a metal deflector or curtain not less than two and one-half inches deep installed at the upper outer edge of the booth over the opening.
(f) Each spray booth shall be separated from all other operations by not less than three feet.
(g) Spray booths shall be so installed that all portions are readily accessible for cleaning. A clear space of not less than three feet on all sides shall be kept free from storage or combustible construction.
(h) When spraying areas are illuminated through glass panels or other noncombustible transparent materials, only approved fixed lighting units shall be used as a source of illumination. Panels shall effectively isolate the spraying area from the area in which the lighting unit is located, and shall be of noncombustible material of such a nature or so protected that breakage will be unlikely. Panels shall be so arranged that normal accumulations of residue on the exposed surface of the panel will not be raised to a dangerous temperature by radiation or conduction from the source of illumination.
(Prior code § 129.1-52)
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