[Recommendations and notes for Manual RP 2.2.-013-94, "Hygienic criteria in the evaluation of work conditions according to indicators of harmfulness and risks of industrial environment factors and hardness and intensity of the work process"].

Some modifications need to be set in Classification of work conditions, adopted in Manual R rho 2.2.013-94 "Hygienic criteria to evaluate work conditions through occupational hazards and jeopardy, work hardness and intensity". We suggest to modify maximal allowable levels of general vibration, local vibration and infrasound. A recommended formula characterizes total vibration dose received through exposure to several factors, calculates work duration in accordance with all acting hazards.