Ordinance on Industrial Safety and Health
Ministry of Labour Ordinance No. 32 of September 30, 1972
Latest Amendments:
Ministry of Health, Labour and Welfare Ordinance No. 47 of March 30, 2007
In Japanese
掲載日：2008.03.28
Part II Safety Standards
Chapter VIII Prevention of Dangers in Tree Felling Work, etc.
Section 3 Skyline Logging Cable Cranes and Logging Cableways
Article 498 (Installation of Skyline Logging Cable Cranes, etc.)
- (1) The employer shall, when intending to install a skyline logging cable crane or logging cableway, notify in advance an operations chief of forestry cableway of the following matters:
- (i) Places where supports and principal machines are installed.
- (ii) Type and diameter of wire ropes to be used.
- (iii) Central dangling ratio.
- (iv) Maximum working load and the maximum loading capacity of each carrier.
- (v) Maximum traction force of the yarder of the skyline logging cable crane.
Article 499 (Braking Device, etc.)
- (1) The employer shall conform a skyline logging cable crane or a logging cableway to the following provisions:
- (i) To provide an effective braking device for stopping carriers or lifted cargoes as necessary except when there is no need to brake such carriers or lifted cargoes.
- (ii) To wind up main cable, stay ropes and work ropes at least twice onto the sound stationary objects such as standing trees, stumps, etc., which are stationary and rigid, and fasten such ropes securely using clips, clamps or other fastening tools.
- (iii) To use two stays or more to stabilize the top of the supports, and make the angle formed by a stay and a support 30 degrees or more.
- (iv) To fasten saddle blocks, guide blocks, etc., securely using shackles, anchor ropes or other fittings that unlikely to be broken or coming off by the load applied to the fastened portions.
- (v) To use carriers, main cable supporting devices and other accessories that has sufficient strength.
- (vi) When fastening the end of the towing ropes or work ropes to a carrier or a loading block, to fasten securely with clips, eye splices or other methods.
Article 500 (Safety Coefficient of Wire Rope)
- (1) The employer shall, as regards the ropes for skyline logging cable cranes or logging cableways listed in the left column of the following table, use wire ropes having a safety coefficient listed in the right column of the said table or more corresponding to the use of such cables:
Uses of wire rope Safety coefficient Main cable 2.7 Towing rope 4.0 Work rope (excluding hoisting rope) 4.0 Hoisting rope 6.0 Stay rope 4.0 Anchor rope 4.0 Cargo lifting rope 6.0 - (2) The safety coefficient set forth in the preceding paragraph shall be the value of the breaking load of wire ropes divided by the value of maximum tension corresponding to the constructing condition of the said skyline logging cable cranes or logging cableways and the load applied to the said wire ropes.
Article 501 (Prohibition of the Use of an Inadequate Wire Rope)
- (1) The employer shall, as regards a wire rope for a skyline logging cable crane or a logging cableway, not use a wire rope falling under any of the following item:
- (i) Those with one-tenth or more of the element wires are cut in one strand.
- (ii) Those with the reduction ratio of a diameter due to wear-out, of which are exceeding 7% of the nominal diameter.
- (iii) Those with kink.
- (iv) Those with marked deformation or corrosion.
Article 502 (Work Ropes)
- (1) The employer shall, as regards the work ropes for skyline logging cable cranes (excluding endless cables), take the following measures:
- (i) The length of operations cables shall be one that may leave two or more windings around the drum of the yarder when the said cables are used at the maximum length.
- (ii) The end of operation cables shall be fastened securely to the drum of the yarder with clamps, clips or other fastening tools.
Article 503 (Prevention of Over-Winding)
- (1) The employer shall, as regards skyline logging cable cranes, in order to prevent over-winding of hoisting ropes, take measures such as attaching a sign on the hoisting ropes, installing a signal device.
Article 504 (Yarder or Cableway)
- (1) The employer shall, as regards the yarder of skyline logging cable crane or the cableway of logging cableway, take the following measures:
- (i) To install the said yarder or cableway so as not to float, slip out of place or swing.
- (ii) To provide ratchet or brakes fitted with studs.
Article 505 (Indication of Maximum Working Load, etc.)
- (1) The employer shall, as regards skyline logging cable cranes, indicate the maximum working load at a readily visible location, and make them known to workers.
- (2) The employer shall, as regards skyline logging cable cranes, not use the said cranes at a load exceeding the maximum working load set forth in the preceding paragraph.
Article 506
- (1) The employer shall, as regards logging cableways, indicate the following matters at a readily visible location, and make them known to workers:
- (i) The maximum working load
- (ii) The distance between carriers
- (iii) The maximum loading capacity for each carrier
- (2) The employer shall, as regards logging cableways, not use the said cableways at a load exceeding the maximum working load set forth in item (i) of the preceding paragraph and the maximum loading capacity for each carrier set forth in item (iii) of the same paragraph.
Article 507 (Signals, etc.)
- (1) The employer shall, when carrying out a forestry cableway work (meaning the work constructing, dismantling, altering or repairing a skyline logging cable crane or a logging cableway, or yarding or log conveying by the said devices; the same shall apply hereinafter), provide devices of a telephone, an electric bell, etc., designate persons who use each said device and have the said persons use them, or set fixed signals, designate a person who gives the signals and have the said person give the signals, in order to ensure the communications between the operator of the crane or cableway and the worker hitching cargoes.
Article 508 (Prohibition of Entry)
- (1) The employer shall, when carrying out the work of forestry cableway, not allow a worker to enter the following places:
- (i) Places under the main cable where it is liable to cause dangers to workers due to fallen or lowered cargoes.
- (ii) Place located within the interior angle of the work rope, which is liable to cause dangers to workers due to rebounding or loose ropes, guide blocks, etc.
Article 509 (Restriction of Riding)
- (1) The employer shall not allow a worker to ride on the carrier, lifted cargo, weight, etc. of a skyline logging cable crane or a logging cableway that are hung. However, this shall not apply to the case where carrying out the temporary work of checking, repairing, etc., for equipment of a carrier, ropes, etc., and when taking measures, which is unlikely to cause danger due to falling.
- (2) A worker shall not ride on the carriers, etc., that are hung set forth in the preceding paragraph, excluding the case set forth in the proviso of the same paragraph,.
Article 510 (Prohibition of Work in Bad Weather)
- (1) The employer shall, when dangers regarding the implementation of a forestry cableway are forecast due to bad weather conditions such as strong wind, heavy rain, heavy snow, not have a worker engage in the said work.
Article 511 (Checkup)
- (1) The employer shall, as regards a forestry cableway work, check the matters listed in the right column of the following table corresponding to the case listed in the left column of the same table, and immediately repair or replace it when having found any abnormalities.
Case requiring inspection Matter to be checked When constructing or altering work was carried outWhen test run was carried out Condition of supports and anchors; Abnormality in yarders, cableways and brakes, and condition of installation of the said machines; Abnormality in main cable, towing ropes, work ropes, stay ropes and anchor ropes and condition of installation of the said ropes; Condition of the fastening portions between carriers or loading blocks and wire ropes; Abnormality in the device such as a telephone and an electric bell set forth in Article 507. After bad weather conditions such as strong wind, heavy rain, heavy snow, and after an earthquake of medium shock or heavier Condition of supports and anchors; Abnormality in yarders, cableways and brakes and condition of installation of the said machines; Condition of installation of main cable, towing ropes, work ropes, stay ropes and anchor ropes; Abnormality in the device such as a telephone and an electric bell set forth in Article 507. Before commencing the work for the day Function of braking device; Abnormality in cargo lifting ropes; Abnormality in the carriers of logging cableways and condition of the fastening portions between carriers and towing ropes; Function of the device such as a telephone and an electric bell set forth in Article 507.
Article 512 (Prohibition of Leaving Operating Station Unattended)
- (1) The employer shall not allow the operator of skyline logging cable cranes or logging cableways to leave an operating station unattended during operation
- (2) Operators set forth in the preceding paragraph shall not leave an operating station unattended during operation of skyline logging cable cranes or logging cableways.
Article 513 (Appointment of an Operations Chief of Forestry Cableways)
- (1) The employer shall, as regards the work set forth in item (iii) of Article 6 of the Order, appoint an operations chief of forestry cableway from the persons who have obtained the license for operations chief of forestry cableway.
Article 514 (Duties of an Operations Chief of Forestry Cableways)
- (1) The employer shall have an operations chief of forestry cableways carry out the following matters:
- (i) To decide a work method and arrangement of workers, and supervise the work directly.
- (ii) To check defects in material and function of an instrument and a tool, and remove defective ones.
- (iii) To monitor the use of a safety belt, etc., and a safety helmet during work.
Article 515 (Examination, etc., of Safety Coefficient of Main Cable)
- (1) The employer shall, when having constructed a skyline logging cable crane or logging cableway or having made an alteration that causes changes in the tension of the main cable, examine the safety coefficient of the main cable, and perform the test run with the maximum working load.
Article 516 (Wearing of a Safety Helmet)
- (1) The employer shall, when carrying out the forestry cableway work, have the worker engaging in the said work wear a safety helmet in order to prevent workers from dangers due to flying or falling objects.
- (2) The worker engaging in the work set forth in the preceding paragraph shall wear the safety helmet set forth in the same paragraph.
Article 517 (Exemption)
- (1) The provisions of paragraph (1) of Article 500 and Article 515 shall not apply to those logging cableways that the maximum working load is less than 200 kg and the total of sloped distances of effective spans is less than 350 m.
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