ISO/TR 25398:2006 PDF

Earth-moving machinery — Guidelines for assessment of exposure to whole-body vibration of ride-on machines — Use of harmonized data measured by international institutes, organizations and manufacturers

First page of standard ISO/TR 25398:2006

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Title (English):

ISO/TR 25398:2006

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 28
Publication date:: September 26, 2006
Edition:: ISO TR 25398 edition 1 version 1
ICS:: 13.160

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Description (English):

ISO/TR 25398:2006 provides guidelines for those such as employers, national authorities and manufacturers of earth-moving machinery who are required to determine, assess and document the daily whole body vibration exposure for ride-on machines as defined in ISO 6165. It also provides guidelines for reducing vibration levels on machines and for determining the vibration reduction from machine improvements to reduce vibration levels. It is intended to assist in establishing documentation for specific earth-moving machinery under typical operating conditions.

Technical details

Technical committee: ISO/TC 127/SC 2 - Safety, ergonomics and general requirements
SKU: ISO/TR 25398:2006

Abstract

Overview

ISO/TR 25398:2006 - "Earth‑moving machinery - Guidelines for assessment of exposure to whole‑body vibration of ride‑on machines" - provides practical, evidence‑based guidance for determining, assessing and documenting daily whole‑body vibration (WBV) exposure for operators of ride‑on earth‑moving machinery (as defined in ISO 6165). The Technical Report is informative and intended for employers, national authorities and manufacturers who need to evaluate vibration exposure, comply with health/safety limits and implement vibration‑reduction measures.

Key topics and technical requirements

Scope and purpose: Guidance on calculating daily vibration exposure A(8) in line with ISO 2631 and EN 14253; does not address shock.
Harmonized data use: Uses harmonized vibration emission data measured by international institutes, organizations and manufacturers (Annex B) to estimate exposure where workplace measurement is not available.
Estimation steps:
- Determine vibration magnitude (frequency‑weighted rms acceleration) - Annex B and Clause 4.
- Estimate daily exposure duration (operator contact time with the vibrating seat) - Clause 5.
- Consider measurement and data uncertainties - Clause 6.
- Calculate and assess daily exposure A(8) and/or use a points system for partial and total vibration exposure (Annex C).
Documentation and forms: Templates and example documentation forms for exposure reporting (Annex D).
Vibration reduction: Practical guidance to reduce WBV through machine setup, operating practices and terrain management (Annex E) and guidance for measuring vibration reductions resulting from machine improvements (Annex F).
Definitions and classifications: Terms, operating time, equivalent vibration values and machine‑type operating conditions (Clauses 2–3, Annex A).

Practical applications - who uses it

Employers and safety managers: estimate operator A(8), decide if exposure action/limit values may be exceeded, and document compliance.
Manufacturers and designers: evaluate seat/suspension performance, quantify vibration‑reduction features and report harmonized emission values.
Regulators and occupational health professionals: use standardized methods to assess exposure, interpret results against exposure action/limit values (for example, A(8) = 0.5 m/s² is commonly cited as an action threshold) and guide enforcement.
Consultants and researchers: apply harmonized datasets when site measurements are impractical and compare results across studies or fleets.

Related standards

ISO 2631 (evaluation of human exposure to whole‑body vibration)
ISO 6165 (earth‑moving machinery types)
ISO 7096 (seat vibration laboratory evaluation)
EN 14253, EN 474 and EN 500 series
European Physical Agents (Vibration) Directive 2002/44/EC

ISO/TR 25398:2006 is a practical reference for consistent WBV exposure assessment of ride‑on earth‑moving machines, supporting compliance, risk reduction and documentation using harmonized measurement data.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope and purpose: Guidance on calculating daily vibration exposure A(8) in line with ISO 2631 and EN 14253; does not address shock.
Harmonized data use: Uses harmonized vibration emission data measured by international institutes, organizations and manufacturers (Annex B) to estimate exposure where workplace measurement is not available.
Estimation steps:
- Determine vibration magnitude (frequency‑weighted rms acceleration) - Annex B and Clause 4.
- Estimate daily exposure duration (operator contact time with the vibrating seat) - Clause 5.
- Consider measurement and data uncertainties - Clause 6.
- Calculate and assess daily exposure A(8) and/or use a points system for partial and total vibration exposure (Annex C).
Documentation and forms: Templates and example documentation forms for exposure reporting (Annex D).
Vibration reduction: Practical guidance to reduce WBV through machine setup, operating practices and terrain management (Annex E) and guidance for measuring vibration reductions resulting from machine improvements (Annex F).
Definitions and classifications: Terms, operating time, equivalent vibration values and machine‑type operating conditions (Clauses 2–3, Annex A).

Practical applications - who uses it

Employers and safety managers: estimate operator A(8), decide if exposure action/limit values may be exceeded, and document compliance.
Manufacturers and designers: evaluate seat/suspension performance, quantify vibration‑reduction features and report harmonized emission values.
Regulators and occupational health professionals: use standardized methods to assess exposure, interpret results against exposure action/limit values (for example, A(8) = 0.5 m/s² is commonly cited as an action threshold) and guide enforcement.
Consultants and researchers: apply harmonized datasets when site measurements are impractical and compare results across studies or fleets.

Related standards

ISO 2631 (evaluation of human exposure to whole‑body vibration)
ISO 6165 (earth‑moving machinery types)
ISO 7096 (seat vibration laboratory evaluation)
EN 14253, EN 474 and EN 500 series
European Physical Agents (Vibration) Directive 2002/44/EC

ISO/TR 25398:2006 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications - who uses it

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications - who uses it

Related standards

Related standards

Earth-moving machinery - Basic types - Identification and vocabulary (ISO 6165:2022)

Mechanical vibration and shock - Evaluation of human exposure to wholebody vibration - Part 2: Vibration in b…

Earth-moving machinery. Laboratory evaluation of operator seat vibration