ISO 8686-4:2005 クレーン—荷重と荷重の組み合わせの設計原理—パート4：ジブクレーン | ページ 2

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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

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.

ISO 8686-4 was prepared by Technical Committee ISO/TC 96, Cranes, Subcommittee SC 8, Jib cranes.

ISO 8686 consists of the following parts, under the general title Cranes — Design principles for loads and load combinations:

• Part 1: General
• Part 2: Mobile cranes
• Part 3: Tower cranes
• Part 4: Jib cranes
• Part 5: Overhead travelling and portal bridge cranes

Introduction

This part of ISO 8686 establishes requirements and gives guidance and design rules that reflect the present state of art in the field of crane machine design. The rules given represent good design practice that ensures fulfilment of essential safety requirements and adequate service life of components. Deviation from these rules normally could lead to increased risks or reduction of service life, but it is acknowledged that new technical innovations, materials, etc. can enable new solutions that result in equal or improved safety and durability.

1 Scope

This part of ISO 8686 applies the general design principles set forth in ISO 8686-1 to jib cranes, i.e. jib-type cranes other than those offshore, tower, mobile, railway, gantry and overhead cranes covered in other parts of ISO 8686, as defined in ISO 4306-1, and presents loads and load combinations appropriate for use in proof-of-competence calculations for the steel structures of jib cranes.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms, definitions, symbols and abbreviated terms

For the purposes of this part of ISO 8686, the terms, definitions, symbols and abbreviated terms given in ISO 8686-1 apply.

Bibliography