How are the intensity levels of physical labor classified?

2.1 For Grade I physical labor, the average energy consumption per 8-hour workday is 3,558.8 kJ per person; the labor efficiency rate is 61%, meaning the net working time is 293 minutes, which corresponds to light labor. 　　2.2 For Grade II physical labor, the average energy consumption per 8-hour workday is 5,560.1 kJ per person; the labor efficiency rate is 67%, meaning the net working time is 320 minutes, which corresponds to moderate-intensity labor. 　　2.3 For Grade III physical labor, the average energy consumption per 8-hour workday is 7,310.2 kJ per person; the labor efficiency rate is 73%, meaning the net working time is 350 minutes, which corresponds to heavy-intensity labor. 　　2.4 For Grade IV physical labor, the average energy consumption per 8-hour workday is 11,304.4 kJ per person; the labor efficiency rate is 77%, meaning the net working time is 370 minutes, which corresponds to labor of a \"very heavy\" intensity.

This post was last edited by nanbo888 on 2011-2-17 21:18. Please refer to the **standard GB 3869—83 version**

It is recommended to refer to GB3869-1997

Refer to GBZ/T189.10-2007 Classification of physical labor intensity based on the measurement of physical factors in the workplace :victory:

GB3869-1997 is too technical; for our manufacturing units, there are no intuitive and clear grading criteria. Whenever occupational health is involved, a set of calculations is required, as well as specialized testing equipment, and it’s still not clear how to determine the grades

I took another look; Appendix B of GBZ2.2-2007 on physical factors contains a straightforward description...