ISO 612-1978 PDF

Full title and description

Road vehicles — Dimensions of motor vehicles and towed vehicles — Terms and definitions (ISO 612:1978). This International Standard establishes and defines vocabulary and terms used to describe the principal dimensions of motor vehicles and their towed vehicles (trailers), providing consistent names and definitions for lengths, heights, tracks, overhangs and related dimensional features.

Abstract

The 1978 edition of ISO 612 replaces ISO Recommendation R 612 (1967) and provides standardized terms and definitions relating to the dimensions of motor vehicles and towed vehicles. It defines vocabulary only and does not specify methods of measurement, units of reporting, required accuracy or numerical limits for the dimensions themselves.

General information

• Status: Published (International Standard, confirmed)
• Publication date: March 1978 (published 1 March 1978)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 43.020 (Road vehicle engineering); 01.040.43 (Road vehicle engineering — vocabularies)
• Edition / version: Edition 1 (ISO 612:1978)
• Number of pages: 15

Scope

ISO 612:1978 sets out terms and definitions for the principal dimensions of motor vehicles and towed vehicles. It applies to passenger cars, commercial vehicles and trailers where dimensional terminology is required for design, documentation, regulation and communication. The standard does not prescribe measurement procedures, units of measurement or tolerances; it only establishes consistent names and meanings for dimensional features (for example, wheelbase, overall length, track, front/rear overhang, overall height, ground clearance and related concepts).

Key topics and requirements

• Standardized vocabulary for vehicle dimensional features (lengths, heights, tracks, overhangs, clearances).
• Definitions of principal dimensional terms used in vehicle design, regulation and documentation.
• Clarification that the standard is limited to terminology and does not specify measurement methods, units or accuracy requirements.
• Application to motor vehicles and towed vehicles (trailers) across vehicle categories where dimensional descriptions are required.

Typical use and users

Engineers (vehicle design and packaging), technical writers, regulatory authorities, homologation and type-approval specialists, standards bodies, vehicle dimension data providers, suppliers and educators. Typical uses include creating technical drawings and specifications, regulatory documentation, interoperability of vehicle data between organizations, and harmonizing terminology in international specifications and regulations.

Related standards

Standards commonly referenced alongside ISO 612 include other vehicle vocabulary and dimensional/identification standards such as ISO 3833 (vehicle types — terms and definitions), ISO 4130 (three-dimensional reference system and fiducial marks), ISO 1176 (masses — vocabulary and codes) and various regional regulations that reference ISO 612 terminology when specifying vehicle dimension reporting. ISO 612:1978 replaced ISO/R 612:1967.

Keywords

vehicle dimensions, wheelbase, overall length, track width, overhang, ground clearance, vehicle vocabulary, motor vehicles, trailers, definitions, ISO 612

FAQ

Q: What is this standard?

A: ISO 612:1978 is an International Standard that defines terms and vocabulary for the dimensions of motor vehicles and towed vehicles (trailers).

Q: What does it cover?

A: It covers the names and definitions of principal dimensional features (lengths, heights, tracks, overhangs, clearances) used to describe motor vehicles and towed vehicles. It does not prescribe how to measure those dimensions or specify units, tolerances or numerical limits.

Q: Who typically uses it?

A: Vehicle designers and engineers, regulatory and homologation authorities, standards writers, technical documentation teams and suppliers who need consistent terminology for vehicle dimensions.

Q: Is it current or superseded?

A: This is the 1978 edition (Edition 1). It replaced ISO/R 612:1967 and is recorded in ISO’s catalogue as the 1978 International Standard. The document is the ISO 612 edition from 1978 (15 pages) and is listed as published/confirmed in the ISO catalogue. Users should check the official ISO catalogue or their national standards body for any later revisions or status changes before relying on the standard for regulatory or contractual purposes.

Q: Is it part of a series?

A: ISO 612 is part of ISO’s body of road-vehicle-related vocabulary and dimensional guidance and is commonly used alongside other vehicle standards (for example standards on vehicle types, masses, identification and three-dimensional reference systems). It sits within the set of vehicle engineering vocabularies maintained by ISO/TC 22.

Q: What are the key keywords?

A: Vehicle dimensions, wheelbase, overall length, track width, overhang, ground clearance, vehicle vocabulary, trailers.