Overview
CEN/TS 15730:2008 (identical to ISO/TR 25398:2006) provides practical guidelines for assessing whole-body vibration (WBV) exposure of operators of ride-on earth-moving machinery. Intended for employers, national authorities and manufacturers, the Technical Specification explains how to determine, document and reduce daily vibration exposure for machines defined in ISO 6165. It uses harmonized emission data measured by international institutes, organizations and manufacturers to support consistent, repeatable exposure assessments under typical operating conditions.
Key topics and requirements
- Scope and purpose: Guidance for determining daily vibration exposure A(8) and documenting results for ride-on earth-moving machines; not intended for shock assessment.
- Normative references: Relies on existing standards such as ISO 2631, ISO 6165, ISO 7096 and EN 14253 for measurement and evaluation principles.
- Core terms and definitions: Clarifies important concepts like operating time, exposure duration (T) and equivalent vibration value (aw,eq) to ensure consistent application.
- Estimation methods: Covers estimation of vibration magnitude, daily exposure duration and methods for combining multiple exposures. Provides a table-based simplified method to determine daily exposure as a function of equivalent vibration and exposure duration.
- Uncertainty and representative data: Emphasizes the influence of operator, jobsite and machine variables and the need to use representative harmonized data; mandates workplace measurements where harmonized data are not representative or insufficient to decide compliance.
- Documentation and reporting: Includes forms and guidance (annexes) for recording machine types, typical operating conditions, calculated exposure points and measured vibration reduction following machine improvements.
- Reduction measures: Annexes provide practical guidelines for reducing WBV (machine maintenance, operator practice, terrain) and for measuring/ reporting vibration reductions after modifications.
Applications and who uses it
- Employers and safety managers conducting occupational risk assessments and complying with the EU Physical Agents (Vibration) Directive (2002/44/EC).
- Machine manufacturers validating seat and suspension designs, quantifying vibration emission and claiming vibration reductions after improvements.
- National authorities, occupational hygienists and procurement teams requiring documented, harmonized exposure data for regulation, inspection or specification.
- Maintenance planners and operators applying guidance to reduce operator vibration through machine setup and worksite practices.
Related standards
- ISO/TR 25398:2006 (original Technical Report) - adopted as CEN/TS 15730:2008
- ISO 2631 (evaluation of human exposure to WBV)
- ISO 6165 (earth-moving machinery vocabulary and types)
- ISO 7096 (laboratory evaluation of operator seat vibration)
- EN 14253 (practical guidance for occupational WBV measurement and calculation)
Keywords: earth-moving machinery, whole-body vibration, ride-on machines, exposure assessment, CEN/TS 15730, ISO/TR 25398, vibration reduction, operator seat, A(8), occupational vibration.
