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Washington Administrative Code (Last Updated: November 23, 2016) |
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Title 296. Labor and Industries, Department of |
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Chapter 296-78. Safety standards for sawmills and woodworking operations. |
Section 296-78-70507. Upright shingle machine.
Latest version.
- (1) Upright shingle saw guard.(a) Every shingle machine carriage shall be equipped with a hand guard which:(i) Projects at least one inch beyond the cutting edge of the saw.(ii) Shall be located not more than one-half inch from the side of the saw blade.(b) Shingle saw guards shall have a rim guard so designed and installed as to prevent chips and knots from flying from the saws. Such guards shall cover the edge of the saw to at least the depth of the teeth, except such part of the cutting edge as is essential for sawing the material.(c) Saw arbors and couplings shall be guarded to prevent contact.(d) Every part of a clipper saw blade, except that part which is exposed to trim shingles, shall be enclosed by a guard, so designed and installed to prevent contact with the clipper saw. An additional guard shall be installed not more than four inches above the clipper board and not more than one-half inch from the vertical plane of the saw.(e) The underside of clipper saw boards shall be equipped with a finger guard to effectively protect the operator's fingers. The guard shall be a minimum of five inches long and one and one-quarter inches deep.(2) Upright carriage guards.(a) Automatic revolving cam set works and rocker arms, on machine frame, shall be guarded where exposed to contact.(b) The spault catchers shall be not less than three-sixteenths inch thick and kept sharp at all times. Missing teeth shall be replaced.(3) Carriage feed works.(a) The pinion gear, bull wheel and Johnson bar, operating the saw carriage, shall be guarded where exposed to contact.(b) Each shingle machine clutch treadle shall be arranged so that it is necessary to manually operate the treadle to start the machine. Devices which start the machine when the jaw treadle is released shall not be installed or used. The carriage shall have a brake to hold it in a neutral position.(c) Carriage speed shall not exceed thirty-four strokes per minute.