ISO R 39-1957 PDF

Full title and description

St ISO R 39-1957 — Shipbuilding — Anchor Chains — Lugless Joining Shackles. This is the original ISO Recommendation (ISO/R 39:1957) that defined the form, proportions and basic requirements for lugless (Kenter-type) joining shackles used to connect stud-link anchor chain lengths in shipbuilding and marine mooring applications.

Abstract

ISO/R 39:1957 specified dimensions and basic requirements for lugless joining shackles (Kenter-style) for anchor chain assemblies. The recommendation was withdrawn and later incorporated into the ISO 1704 series covering anchor chains and joining fittings.

General information

• Status: Withdrawn / Historic ISO Recommendation.
• Publication date: December 1957.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 47.020.01 (Shipbuilding — anchors, chains and related equipment).
• Edition / version: Edition 1 (ISO/R 39:1957).
• Number of pages: 1.

Scope

Defines the intended characteristics of lugless joining shackles used to join stud-link anchor chains in shipboard and offshore applications — chiefly geometry, basic proportions, and the intended application for joining chain lengths. The recommendation served as an early international technical reference before being superseded by fuller ISO standards addressing complete anchor-chain systems.

Key topics and requirements

• Definition and terminology for lugless (Kenter) joining shackles used with stud-link anchor chains.
• Dimensional form and key proportions for interchangeability with chain links and gypsy/handling equipment.
• Material and basic manufacturing intent (intended for steel chain systems used in shipbuilding).
• Basic marking and identification expectations for traceability (historic recommendation-level requirements).
• Reference to testing and inspection principles later expanded in successor ISO 1704 series standards.

Typical use and users

Historically used by shipbuilders, chain and joining-shackle manufacturers, classification societies, naval architects and marine equipment procurement groups as an early international reference for joining-shackle geometry and interchangeability. Today it is of archival and historical interest; current work uses successor ISO 1704-series standards and modern classification society rules.

Related standards

Superseded and consolidated into the ISO 1704 series (first replacement ISO 1704:1973), with later revisions of ISO 1704 (1991, 2008 and subsequent updates) that cover stud-link anchor chains and associated joining fittings in more detail. National and classification society rules for anchor-chain fittings are also relevant.

Keywords

ISO/R 39, ISO R 39-1957, lugless joining shackle, Kenter shackle, anchor chain, shipbuilding, stud-link chain, joining fittings, withdrawn standard, ISO 1704.

FAQ

Q: What is this standard?

A: ISO/R 39:1957 is an early ISO Recommendation titled "Shipbuilding — Anchor Chains — Lugless Joining Shackles" that set out basic dimensions and requirements for lugless (Kenter-type) joining shackles for anchor chains.

Q: What does it cover?

A: It covers the form, proportions and intended application of lugless joining shackles used to join stud-link anchor chains; the recommendation provided interchangeability guidance and basic technical requirements at that time.

Q: Who typically uses it?

A: Historically: shipbuilders, chain manufacturers, classification societies and marine engineers. Today it is primarily of historical/reference interest; contemporary users rely on later ISO 1704 editions and classification society rules.

Q: Is it current or superseded?

A: ISO/R 39:1957 has been withdrawn. Its content was superseded and incorporated into ISO 1704 (first published 1973) and later revisions of the ISO 1704 series; consult current ISO 1704 editions or national/classification rules for in-force requirements.

Q: Is it part of a series?

A: It is an early Recommendation that was later absorbed into the ISO 1704 series for anchor chains and joining fittings; follow-on revisions and related ISO/TC 8 outputs address complete anchor-chain systems.

Q: What are the key keywords?

A: Lugless joining shackle, Kenter link, anchor chain, stud-link chain, shipbuilding fittings, ISO/R 39, ISO 1704, withdrawn standard.