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 III Concrete Form Shoring
Section 1 Material, etc
Article 237 (Material)
- (1) The employer shall, as regards materials for concrete form shoring, not use those with extreme damage, deformation or corrosion.
Article 238 (Steel Used for Main Part)
- (1) The employer shall, as regards steel materials for main parts of supports, girders or supporting members for girders to be used for concrete form shoring, not use those materials unless otherwise conform to the Japanese Industrial Standard, G 3101 (Rolled Steel for General Structure), the Japanese Industrial Standard, G 3106 (Rolled Steel for Welded Structure), the Japanese Industrial Standard, G 3444 (Carbon Steel Tubes for General Structural Purposes), or the Japanese Industrial Standard, G 3350 (Cold-formed Light Gauge Steels for Construction Structure), or those materials of which the value of tensile strength is 330 N/mm2 or more in a test conducted by the method prescribed by the Japanese Industrial Standard, Z2241 (Method of Tensile Test for Metallic Materials), and which have elongation listed in the right column of the following table corresponding to the type of material and value of the tensile strength listed in the left column and the middle column of the same table respectively:
Type of material Tensile strength (N/mm2) Elongation (%) Steel pipe 330 or more but less than 400 25 or more 400 or more but less than 490 20 or more 490 or more 10 or more Steel plate, gauge steel, flat steel, or light gauge steel 330 or more but less than 400 21 or more 400 or more but less than 490 16 or more 490 or more but less than 590 12 or more 590 or more 8 or more Bar steel 330 or more but less than 400 25 or more 400 or more but less than 490 20 or more 490 or more 18 or more
Article 239 (Structure of Concrete Form Shoring)
- (1) The employer shall, as regards a concrete form shoring, not use unless the one with sound structure corresponding to the configuration of the concrete form, method of placing concrete, etc.
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