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 2 Log Conveying Work by Wooden Sleigh and Snow Sledge
Article 485 (Path of Wooden Sleigh)
- (1) The employer shall conform the paths of wooden sleighs used in log conveying work (hereinafter referred to as “paths of wooden sleighs”) to the following provisions. However, this shall not apply to the paths of incline type wooden sleighs:
- (i) To ensure the longitudinal gradient of the wooden sleigh path one half or less (one third or less for the section of landing pier), and one tenth or less for the section of 10 m immediately before the curved section with a radius of less than 5 m (excluding the second curved section and after in the case that there are a series of curved sections at the intervals of less than 10 m) excluding monoraoil paths or sleigh paths for wooden sleigh with effective braking devices and paths equipped with braking wire ropes.
- (ii) To ensure the transversal gradient of the curved section one fourth or less.
- (iii) To ensure the width of the wooden sleigh path 30 cm or more larger than the width of the wooden sleigh platform, and t for the section where the radius of the curvature is less than 5 m, the value of the width of sleigh platform plus 30 cm and one fifth of the length of the wooden sleigh or greater,
- (iv) To maintain treads of the wooden sleigh path in a condition that will not cause dangers due to stumbling, stepping on a sliver, etc., to the workers.
- (v) For the part where it is liable to cause dangers due to obstacles such as rocks and stumps lying along the outer curvature of the treads, to remove the said obstacles and level the ground.
- (vi) To set up warning signs readily visible to the workers at the point of 10 m immediate before the sections where the longitudinal gradients are one eighth or more, the visibility of less than 30 m, the cross sections and any other points 10 m before the sections where it is liable to cause dangers in travelling the wooden sleighs.
- (vii) To ensure the landing piers of sound structure and take measures to prevent dangers due to stepping out such as providing joined planks and supplementary joined boards.
- (viii) To provide wooden guardrails of 5 cm or more in height at the outer curvature of the path with the radius of less than 5 m and the landing pier excluding monorail paths for wooden sleighs.
Article 486
- (1) The employer shall, when sections of paths of wooden sleighs (excluding paths of monorail wooden sleighs, incline-type wooden sleighs and other wooden sleighs equipped with effective braking device) extend 10 m or more of which the longitudinal gradient is one-eighth or more, provide with braking wire ropes, and have workers use the said wire ropes.
- (2) The worker engaging in the log conveying work at the paths of wooden sleigh set forth in the preceding paragraph shall use the braking wire rope set forth in the same paragraph.
Article 487
- (1) The braking wire ropes set forth in paragraph (1) of the preceding Article shall be free of marked wear, corrosion, cuts or other defects, and shall have a diameter of 6 mm or more when the longitudinal gradient of paths of wooden sleighs is one-third or less, and 9 mm or more when the said gradient exceeds one-third.
- (2) The employer shall fasten the wire ropes set forth in the preceding paragraph securely to sound stationary objects such as standing trees, stake, a stump, etc.
Article 488 (Loading onto Wooden Sleighs)
- (1) The employer shall, when loading onto a wooden sleigh, fix the load securely with such tools as clamps and ropes, and make the height of the load equivalent to four times the width at the center of the said wooden sleigh or less, excluding wooden sleighs of the incline system.
Article 489 (Wooden Sleigh Work)
- (1) The employer shall, when carrying out the work pulling a loaded wooden sleigh, have the worker engaging in the said work carry out the following matters. However, as regards item (i), this shall not apply to level sections of paths of wooden sleighs:
- (i) To keep a distance of 30 m or more between wooden sleighs excluding monorail wooden sleighs and wooden sleighs of the incline system.
- (ii) To make the length of a shoulder rope long enough not to be caught in wooden sleighs while pulling a wooden sleigh, and also at sections where the longitudinal gradient of paths of wooden sleighs is one-eighth or more, not to use diagonally, excluding when the said rope is easily removed from the wooden sleighs.
- (iii) To exchange the braking wire ropes set forth in paragraph (1) of Article 486 only after a wooden sleigh has been stopped completely.
- (2) The worker engaging in the work set forth in the preceding paragraph shall carry out the matters listed in each item of the same paragraph.
Article 490 (Checkup)
- (1) The employer shall, when carrying out the log conveying work by a wooden sleigh, check the following matters before commencing the work for the day:
- (i) Condition of the paths of wooden sleighs.
- (ii) When using paths of wooden sleighs equipped with the braking wire ropes set forth in paragraph (1) of Article 486, the conditions of the said braking wire ropes.
- (iii) When using a wooden sleigh equipped with a braking device, the function of the said braking device.
- (2) The employer shall, when carrying out a log conveying work by wooden sleigh using paths of wooden sleighs having landing piers that have not been used for one month or more, examine in advance corrosions on the bents, girders, beams, stays and bracings of such piers, the condition of the fastening portions, connecting portions and mounting portions of such bents, etc., and the condition of loosening of such bents.
- (3) The employer shall, when having found any abnormalities at the checkup set forth in the preceding two paragraphs , immediately repair them.
Article 491 (Paths of Snow Sledges)
- (1) The employer shall, as regards paths of snow sledges in the case of carrying out log conveying work using snow sledges (excluding snow sledges using cattle power and those of the incline system, the same shall apply hereinafter), (hereinafter referred to as “paths of snow sledges”), conform to the following provisions:
- (i) To conform the longitudinal gradient of paths of snow sledges to following provisions corresponding to the structure of the snow sledges:
- (a) When using snow sledges having a structure in which part of the cargo touches the treads of snow sledge, one fourth or less (for sections where the length of straight section is less than 20 m, one third or less), and for a sections of 20 m immediately before a curved section of which radius of curvature is less than 10 m (excluding the second curved section and beyond when curved section exists continuously at interval(s) of less than 20 m), one-fifth.
- (b) When using snow sledges having a structure in which the cargo does not touch the treads of snow sledges, one-fifth.
- (ii) As regards treads or outer circumferences of paths where are liable to cause dangers due to obstacles such as rocks and stumps, to remove the said obstacles, or to level them.
- (iii) To put up a warning sign in such manner that workers may easily become aware of them at locations 20 m immediately before sections of which the longitudinal gradient is one-tenth or more, sections where the visibility is less than 50 m in the paths of snow sledges, crossing with another path, bridges, and places where is liable to cause dangers due to the operation of snow sledges.
- (iv) To take measures for reducing the speed of snow sledges, such as spreading soil, straw, chaff, etc., at sections where is liable to cause danger due to over speed of snow sledges.
- (i) To conform the longitudinal gradient of paths of snow sledges to following provisions corresponding to the structure of the snow sledges:
Article 492
- (1) The employer shall not use a snow sledges for log conveying operations unless it is equipped with an effective braking device.
Article 493 (Loading into Snow Sledges)
- (1) The employer shall, when carrying out the log conveying operations, fix logs securely with such tools as clamps and ropes, and make the height of the load equivalent to two and half times the width at the center of the said snow sledge or less.
Article 494 (Running of Snow Sledges)
- (1) The employer shall, when carrying out the work travelling a snow sledge loaded with cargo on a paths of snow sledge, have the worker engaging in the said work carry out the following matters. However, as regards item (i), this shall not apply to the level sections of paths of snow sledges:
- (i) To keep a distance of 50 m or more between snow sledges.
- (ii) When in stopping a snow sledge, when it is liable to cause a rear-end collision by a following snow sledge, to give a signal promptly to workers who travel the following snow sledge instructing them to stop it.
- (2) The worker engaging in the work set forth in the preceding paragraph shall carry out the matters listed in each item of the same paragraph.
Article 495 (Checkup)
- (1) The employer shall, when carrying out the log conveying work by a snow sledge, check the condition of paths and braking device of the snow sledge before commencing the work for the day, and immediately repair when having found any abnormalities.
Article 496 (Prohibition of Work in Bad Weather)
- (1) The employer shall, when dangers in the implementation of log conveying work by a wooden sleigh or snow sledge 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 497 (Wearing of a Safety Helmet)
- (1) The employer shall, when carrying out the log conveying work by wooden sleigh or snow sledge, 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.
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