ISO 1726-2-2007 PDF

Full title and description

Road vehicles — Mechanical couplings between tractors and semi‑trailers — Part 2: Interchangeability between low‑coupling tractors and high‑volume semi‑trailers. This International Standard specifies dimensional and operating requirements to ensure interchangeability between low‑coupling height tractors and high‑volume semi‑trailers so they can be used together as high‑volume articulated vehicles.

Abstract

ISO 1726-2:2007 defines key interchangeability dimensions (including the optimized gooseneck contour) and operating angle values to permit coupling of high‑volume semi‑trailers to low‑coupling tractors. The specifications are principally intended to allow semi‑trailers to be coupled with two‑axle tractors, though three‑axle tractors are not excluded if they comply with the same requirements. The standard does not set limits on gross mass or overall vehicle dimensions (these are covered by legislation).

General information

• Status: Published (confirmed by ISO review).
• Publication date: 19 April 2007 (ISO publication event recorded 2007‑04‑19).
• Publisher: ISO — International Organization for Standardization (Technical committee: ISO/TC 22/SC 40).
• ICS / categories: 43.040.70 (Couplings).
• Edition / version: Edition 1 (2007).
• Number of pages: 7.

Scope

This part of ISO 1726 specifies dimensional interfaces and operating angles necessary to ensure interchangeability between tractors with a low coupling height and high‑volume semi‑trailers, forming high‑volume articulated vehicles. It covers the gooseneck contour and other interface dimensions required for reliable mechanical coupling; it is not a regulatory document for mass or overall dimension limits.

Key topics and requirements

• Defined interchangeability dimensions for tractor/semi‑trailer interfaces, including optimized gooseneck contour.
• Operating angle values and related operating dimensions to ensure safe coupling and articulation.
• Primary focus on compatibility with two‑axle tractors; applicability to three‑axle tractors when compliant.
• No provisions for maximum gross mass or overall vehicle dimensions (left to legislative/regulatory requirements).
• Purpose: enable interchangeability and reduce design mismatches between tractors and high‑volume semi‑trailers.

Typical use and users

Vehicle manufacturers, semi‑trailer and tractor designers, chassis and coupling component suppliers, certification and conformity assessment bodies, test laboratories, and regulatory authorities use this standard to design and verify mechanical coupling interfaces so trailers and tractors from different manufacturers can be coupled reliably and safely.

Related standards

ISO 1726 series (notably ISO 1726-1:2000 — Interchangeability between tractors and semi‑trailers for general cargo — and its corrigendum ISO 1726-1:2000/Cor 1:2007). Other related documents include standards and national regulations addressing coupling strength, electrical/pneumatic connections, and vehicle dimension/mass limits governed by regional legislation.

Keywords

mechanical coupling, gooseneck contour, interchangeability, tractor, semi‑trailer, coupling height, articulated vehicle, ISO 1726, ISO/TC 22/SC 40

FAQ

Q: What is this standard?

A: ISO 1726-2:2007 is an International Standard that specifies dimensional and operating requirements to ensure interchangeability between low‑coupling tractors and high‑volume semi‑trailers.

Q: What does it cover?

A: It covers key interface dimensions (including an optimized gooseneck contour) and operating angle values needed for safe mechanical coupling of a low‑coupling tractor to a high‑volume semi‑trailer; it does not set limits on vehicle mass or overall dimensions.

Q: Who typically uses it?

A: Tractor and semi‑trailer manufacturers, component suppliers, test labs, conformity bodies and regulators use it for design, verification and ensuring cross‑manufacturer compatibility.

Q: Is it current or superseded?

A: ISO 1726-2:2007 was published on 19 April 2007 and was reviewed and confirmed by ISO in the systematic review completed on 18 July 2022; it remains current (confirmed) as of that review.

Q: Is it part of a series?

A: Yes — it is part of the ISO 1726 series on mechanical couplings between tractors and semi‑trailers (see also ISO 1726-1:2000 and its corrigendum for related interchangeability requirements).

Q: What are the key keywords?

A: mechanical coupling, interchangeability, gooseneck, low‑coupling tractor, high‑volume semi‑trailer, coupling dimensions, articulated vehicle.