National foreword

This British Standard is the UK implementation of ISO 20332:2016.

The UK participation in its preparation was entrusted to Technical Committee MHE/3, Cranes and derricks.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2016.

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html

The committee responsible for this document is ISO/TC 96, Cranes, Subcommittee SC 10, Design principles and requirements.

This second edition cancels and replaces the first edition (ISO 20332:2008), which has been technically revised.

This corrected version ofISO 20332:2016incorporates a correction in Formula (67).

1 Scope

This International Standard sets forth general conditions, requirements, methods, and parameter values for performing proof-of-competence determinations of the steel structures of cranes based upon the limit state method. It is intended to be used together with the loads and load combinations of the applicable parts of ISO 8686.

This International Standard is general and covers cranes of all types. Other International Standards can give specific proof-of-competence requirements for particular crane types.

Proof-of-competence determinations, by theoretical calculations and/or testing, are intended to prevent hazards related to the performance of the structure by establishing the limits of strength, e.g. yield, ultimate, fatigue, and brittle fracture.

According to ISO 8686‑1there are two general approaches to proof-of-competence calculations: the limit state method, employing partial safety factors, and the allowable stress method, employing a global safety factor. Though it does not preclude the validity of allowable stress methodology, ISO 20332deals only with the limit state method.

Proof-of-competence calculations for components of accessories (e.g. handrails, stairs, walkways, cabins) are not covered by this International Standard. However, the influence of such attachments on the main structure needs to be considered.

2 Normative references

3 Terms, definitions, symbols and abbreviated terms

4 General

4.1 General principles

4.2 Documentation

4.3 Alternative methods

4.4 Materials of structural members

4.5 Bolted connections

4.6 Pinned connections

4.7 Welded connections

4.8 Proof-of-competence for structural members and connections

5 Proof of static strength

5.1 General

5.2 Limit design stresses and forces

5.3 Execution of the proof

6 Proof of fatigue strength

6.1 General

6.2 Limit design stresses

6.3 Stress histories

6.4 Execution of the proof

6.5 Determination of the limit design stress range

7 Proof of elastic stability

7.1 General

7.2 Lateral buckling of members loaded in compression

7.3 Buckling of plate fields subjected to compressive and shear stresses

7.4 Execution of the proof

Bibliography

BS ISO 20332:2016

Cranes. Proof of competence of steel structures

Current

Published:

31 Dec 2018