This Standard evaluates dynamic response behaviour of a crane subjected to seismic excitation as a function of the dynamic characteristics of the crane and of its supporting structure. The evaluation takes into account dynamic effects both of regional seismic conditions and of the local conditions on the surface of the ground at the crane location.

The operational conditions of the crane and the risks resulting from seismic damage to the crane are also taken into account.

This Standard lays out the general concept of ULS, but does not extend to proofs of competence which include plastic deformations. When these are permitted by agreement between crane supplier and customer, other standards or relevant literature taking them into account can be used.

NOTE The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 11031 : 2016 Cranes — Principles for seismically resistant design (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows:

ISO 22986: Cranes-Stiffness-Bridge and gantry cranes (MOD)

The symbols which denote the degree of correspondence in the contents between JIS and the corresponding International Standard are IDT (identical), MOD (modified) and NEQ (not equivalent) according to ISO/IEC Guide 21-1

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows:

ISO 22986: Cranes-Stiffness-Bridge and gantry cranes (MOD)

The symbols which denote the degree of correspondence in the contents between JIS and the corresponding International Standard are IDT (identical), MOD (modified) and NEQ (not equivalent) according to ISO/IEC Guide 21-1

These devices give operation information to operators or other persons involved according to the limitation and indication of the operating motion and function.

It is not applicable to end stops such as buffers used to stop trolleying, travelling or derricking movements, nor to erection, dismantling operations or the changing of a cranes configuration.

General requirements of limiting and indicating devices related to the operation and function of tower cranes are given in JIS B 8827-1.

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows :

ISO 10245-3 : 2008 Cranes – Limiting and indicating devices – Part 3 : Power cranes (MOD)

The symbols which denote the degree of correspondence in the contents between JIS and the corresponding International Standard are IDT (identical), MOD (modified) and NEQ (not equivalent) according to ISO/lEC Guide 21-1.

It also deals with guards and restraints in general, concerning the protection of persons on or near the crane with regard to moving parts, falling objects or live parts.

The particular requirements for various types of cranes are given in JIS B 8826-2, JIS B 8826-3, JIS B 8826-4 and JIS B 8826-5.

In some cases, the particular requirements may not comply with the general requirements.

Different dimensions can be permitted provided an equivalent or higher degree of protection is achieved.

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 11660-1 :2008 Cranes-Access, guards and restraints-Part 1: General (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/ lEe Guide 21-1.