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 X Passage, Scaffolding, etc.
Section 2 Scaffolding
Sub-section 3 Log Scaffolding
Article 569
- (1) The employer shall, as regards log scaffoldings, not use unless they conform to the following provisions:
- (i) The interval between standards to be of 2.5 m or less, and to provide the first ledger over the ground at a place having a height of 3 m or less.
- (ii) For the leg of standards, , to burry the foot of standards, provide bridge batten of foot posts, and use sills or take other measures in order to prevent standards from sliding or settling.
- (iii) In the case that the couplings of standards are lap joints, to band the jointing portion at two locations or more with overlapping of 1 m or more; in the case that the couplings of standards are butt joints, to construct the standards with two logs, or band the jointing portion at four locations or more with a splint having a length of 1.8 m or more.
- (iv) The jointing portions and crossing portions of standards, ledgers, brackets, etc., to be firmly bound with wires or other strong materials.
- (v) To reinforce by diagonal bracings.
- (vi) For single row scaffolding, double row scaffolding and cantilever scaffolding, to provide ties to wall or stays prescribed as follows:
- (a) The interval to be of 5.5 m or more in the vertical direction and 7.5 m or more in the horizontal direction.
- (b) To make the scaffolding strong with steel pipes, logs, etc..
- (c) When the scaffoldings are composed of tension members and compression members, the interval between these members to be within 1 m.
- (2) The provision of item (i) of the preceding paragraph shall not apply to the case that it is difficult to conform to the said provision due to the necessity of the work and the said portions are reinforced with bent ledgers, two logs combined, etc.
- (3) The provision of item (vi) of paragraph (1) shall not apply to the case that ties to wall or stays are removed for the works of mounting of window frames and finishing of walls, or it is unavoidable due to necessity of the works, and when taking a measures in order to prevent the said scaffoldings from collapsing, such as providing diagonal members to standards or ledgers instead of the said ties to wall or stays.
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