2015-08-21
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The basic meteorological standard is “GOST 12.1.005-88”, which regulates microclimate parameters and comprises thermal characteristic of work area, work category and year period. It provides standards for optimal and acceptable meteorological conditions.
Optimal meteorological conditions are provided by such microclimate parameters, which ensure normal thermal and functional condition of human organism without heat regulation stress. They give feeling of thermal comfort and create conditions for high productivity of workforce.
Acceptable meteorological conditions are provided by microclimate parameters, which may induce some changes of thermal and functional condition but heat regulation stress is relieved in short time. It doesn’t impact health, but may cause some discomfort and worsen workability.
Considering total energy consumption required for physical activity every work can be referred to easy, normal or hard work category.
Easy physical work (Category I) is activity with energy consumption up to 150 kilocalorie per hour (174 W).
Easy physical work divides into Category Ia - energy consumption up to 120 kilocalorie per hour (139 W) and Category Ib - energy consumption is 121-150 kilocalorie per hour (140-174 W).
Category Ia includes work in sitting or standing position what takes slight physical exertion (work applied in precise instrument-machine engineering, clothing manufacture, offices etc.).
Category Ib includes work in sitting, standing position or walking what takes some physical exertion (work applied in printing industry, communication service, checkers, experts in any industry etc.);
Normal physical work (Category II) is activity with energy consumption 151-250 kilocalorie per hour (175-290 W).
Normal physical work divides into Category IIa - energy consumption is 151-200 kilocalorie per hour (175-232 W) and Category IIb - energy consumption is 201-250 kilocalorie per hour (233-290 W).
Category IIa includes work with constant walking, moving small things (up to 1 kg weight) sitting or standing and takes some physical exertion (work applied in mechanical workshops, in machine engineering, spinning factory etc.).
Category IIb includes work with constant walking, moving and carrying weights up to 1 kg and takes moderate physical exertion (work applied in foundry, rolling, forge, heat and welding workshops etc.).
Hard physical work (Category III) is activity with energy consumption over 250 kilocalorie per hour (290 W).
Category III includes work with constant walking, moving and carrying heavy weights (over 10 kg) and takes great physical effort (work applied in forge workshops with manual ramming and casting in machine engineering and metallurgical works etc.).
The calendar year is divided into two periods: warm period having average daily temperature of external air +10 deg C and higher; and cold period - average daily temperature of external air below +10 deg C.
