Overview
EN ISO 22074-1:2024 (identical to ISO 22074-1:2020) is the CEN-adopted vocabulary for the ISO 22074 series on rail fastening systems in railway infrastructure. This part defines the terms and definitions used across the series to ensure consistent language for design, testing, procurement and maintenance of rail fastening systems. The document clarifies preferred terms and admitted synonyms (e.g., sleeper / tie / cross tie) and provides a common reference for engineers, manufacturers and regulators.
Key Topics
- Scope and purpose
- Establishes standardized vocabulary for the ISO 22074 family related to rail fastening systems.
- No normative references - focused on definitions rather than technical performance limits.
- Track system terminology
- Definitions for ballasted track, ballastless track, sleeper/tie, bearer, running rail, check rail, guard rail, and supporting structure.
- Fastening system concepts
- Clear terms for fastening system, direct/indirect fastening, web support, elastic (resilient) and rigid fastening systems, and embedded rail.
- Fastening components
- Component vocabulary such as rail clip, rail clamp, baseplate (tie plate), baseplate pad, rail pad, adjustment pad/shim and active area of rail pad.
- Performance and characteristic terms
- Definitions for clamping force, static/vertical/lateral/uplift stiffness, dynamic stiffness (low/high frequency), vibration attenuation and noise attenuation.
- Testing references
- Datum surface and coordinate system for test orientation are defined to support consistent laboratory measurements.
Applications
EN ISO 22074-1:2024 is used where consistent terminology is critical:
- Design and engineering - unambiguous language for track and fastening system specifications.
- Manufacturing and product development - common definitions for components (clips, pads, baseplates).
- Testing and conformity assessment - consistent reference for test setups, datum surfaces and stiffness measurements.
- Procurement and contractual documents - prevents misinterpretation in tenders and contracts.
- Maintenance and asset management - harmonized terms for inspection records and maintenance manuals.
- Standards development and training - baseline vocabulary for technical committees, standards writers and training materials.
Target users include railway infrastructure owners, track engineers, fastening-system manufacturers, testing laboratories, procurement teams and standards bodies.
Related standards
- EN ISO 22074-1 is the vocabulary part of the ISO 22074 series (rail fastening systems). For technical specifications and test methods, consult other parts of the ISO 22074 series and guidance from ISO/TC 269 (Railway applications).
- Terminology resources referenced: ISO Online Browsing Platform (OBP) and IEC Electropedia.
Keywords: EN ISO 22074-1:2024, rail fastening systems, railway infrastructure, vocabulary, rail clip, baseplate, rail pad, fastening system, stiffness, vibration attenuation.