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(a) Unless suitable ventilated spray booths are used for all finishing operations, finishing rooms shall be continuously ventilated mechanically when in use. Ventilation shall be adequate to prevent fire and health hazards and the provisions therefor shall be subject to the approval of the Fire Chief and the Commissioner of Air Pollution Control. Ventilation shall be such that the percentage of flammable vapor present in any room or exhaust duct at anytime shall not exceed one-fifth (1/5) the lower explosive limit and that toxicity will be reduced by dilution to a safe concentration.
(b) Exhaust outlets in finishing rooms shall be located at the level where flammable vapors accumulate and generally not more than five (5) feet above the floor level, and shall discharge directly outside the building in an approved location. Stacks and ducts shall be of incombustible material and constructed so that there will be no leakage of flammable vapor therefrom. Exhaust ducts of metal shall be constructed of not lighter than twenty (20) U.S. gauge. Exhaust ducts shall be kept not less than six (6) inches from combustible surfaces and shall have approved incombustible ventilating thimbles where passing through combustible floor, wall or roof construction. Where such exhaust ducts extend through other stories of a building, they shall be enclosed with incombustible enclosures having a fire resistance rating of not less than two (2) hours. The discharge outlets of exhaust ducts shall be located so that the discharge of vapors or residue therefrom or, in the event of fire, the discharge of flame, hot gases or smoke, shall not create a hazardous fire, fume or smoke condition or nuisance. All such exhaust systems shall be independent of all other ventilating systems and shall conform to the applicable provisions of Sections 3155.75 to 3155.77.
(c) So far as practicable, all exhaust ducts shall be installed without ledges or crevices in which paint residue may lodge. Provisions shall be made to permit cleaning the interiors of such exhaust ducts. Such provisions shall include access openings at the bottom of every vertical riser and access openings, spaced not more than twenty (20) feet on centers, in horizontal sections.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Artificial lighting in finishing rooms, spray rooms, spray booths and dipping rooms shall be by electricity only. Except as provided in subsection (b) hereof, all electric wiring and equipment in rooms where flammable finishing materials are applied shall be in conformity with the provisions of Chapter 3161, governing installations in hazardous locations.
(b) Where spraying is done in properly arranged and ventilated spray booths, portions of the finishing room more than twenty (20) feet from such booths need not be considered as hazardous locations in determining requirements for electrical installations unless such portions are so classified as the result of other operations. In the area within twenty (20) feet of properly arranged and ventilated spray booths, provisions governing electrical installations in hazardous locations may be modified to allow motors of the totally enclosed type or of the open-induction type having no brushes, make or break contacts, collects or other arcing or sparking parts, and to allow lamps of the enclosed vapor-tight type.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Finishing rooms in which flammable finishes are applied shall be kept free from all unnecessary combustible material and refuse.
(b) Floors of finishing rooms shall be of incombustible material. Floors of finishing rooms, drain boards and the interiors of spray booths, shall be thoroughly cleaned at least once a day, and all fans, ducts, side-walls and ceilings kept as clean as practicable at all times. In cleaning, care shall be taken to use implements which will not create sparks. Wherever practicable, surfaces to be cleaned shall be sprayed or otherwise wetted down with water before cleaning. Sweepings or deposits from spray booths or rooms, ducts or stacks shall be immediately removed from the building and safely disposed.
(c) Metal waste cans with self-closing covers shall be provided for all waste and rags which have come in contact with flammable finishing material.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
For heating purposes, indirect systems only, such as steam, forced warm air or hot water, shall be used and no open flame shall be permitted in storage cabinets, finishing rooms, dipping rooms, spray rooms or spray booths, except that when approved by the Chief of Fire, direct-fired drying ovens or other drying ovens, and direct-fired unit heaters installed not less than eight (8) feet above the floor level and of a type approved for use in garages and airplane hangars, may be installed in finishing rooms where proper safeguards are provided to prevent flammable vapor travel to a source of ignition. Gravity warm air systems shall not be used.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Sprinklers.
(1) Whenever a building containing rooms in which flammable finishes are applied is classified as a high hazard occupancy, such building shall be equipped throughout with approved automatic sprinklers or other approved automatic fire- extinguishing equipment.
(2) In buildings equipped throughout with automatic sprinklers, all areas within finishing rooms and dipping rooms, including ceilings, walls and interiors of spray rooms and booths, shall be thoroughly protected by automatic wet-pipe sprinklers, or by a system of open sprinklers connected to an approved quick-operating valve actuated by an approved thermostatic system. In buildings not equipped throughout with approved automatic sprinkler systems or other approved automatic fire extinguishing equipment, spray rooms and booths shall be equipped with sprinklers supplied by a pipe of not less than one (1) inch in diameter connected to the domestic water system and installed in conformity with the provisions of Section 389.32.
(3) Sprinkler heads shall be located so that they will not become covered with paint and shall be kept clean.
(b) Hand Fire Extinguishing Equipment. Hand fire extinguishing equipment shall be provided in or immediately outside finishing rooms, and near storage cabinets, spray rooms, and booths, and shall be of such type and in such number as determined by the Fire Chief.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
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