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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)