Annex 8 of NR15 – Vibration

(Wording provided by Ordinance MTE No. 1297, of August 13, 2014)

1. Objectives
2. Characterization and classification of unhealthiness

    1. Objectives

    1.1 Establish criteria for characterizing the unhealthy working condition resulting from exposure to Hand-Arm Vibration (HAV) and Whole-Body Vibration (WBV).

    1.2 The technical procedures for the quantitative assessment of WBV and HAV are those established in the Occupational Hygiene Standards of FUNDACENTRO.

    2. Characterization and classification of unhealthiness

    2.1 The condition is characterized as unhealthy if the daily occupational exposure limit to HAV exceeds a normalized exposure acceleration value (aren) of 5 m/s².

    2.2 The condition is characterized as unhealthy if any of the following daily occupational exposure limits to WBV are exceeded:

    a) Normalized exposure acceleration value (aren) of 1.1 m/s²;

    b) Resultant vibration dose value (VDVR) of 21.0 m/s^1.75.

    2.2.1 For the purpose of characterizing the unhealthy condition, the employer must demonstrate the assessment of both parameters described above.

    2.3 Situations where exposure to HAV and WBV exceeds the occupational exposure limits are characterized as moderately unhealthy.

    2.4 The quantitative assessment must be representative of the exposure, covering organizational and environmental aspects that involve the worker in the performance of their duties.

    2.5 The characterization of exposure must be the subject of a technical report that includes at least the following items:

    a) Objective and dates on which the procedures were carried out;

    b) Description and result of the preliminary exposure assessment, carried out in accordance with item 4 of Annex I of NR-09; (Amended by MTP Ordinance No. 426, of October 7, 2021)

    c) Methodology and criteria employed, including the characterization of exposure and representativeness of the sampling;

    d) Instruments used, as well as the record of calibration certificates;

    e) Data obtained and respective interpretation;

    f) Specific circumstances involving the assessment;

    g) Description of existing preventive and corrective measures, if any, and indication of necessary measures, as well as proof of their effectiveness;

    h) Conclusion.