ISO 16625:2025 クレーンとホイスト — ワイヤーロープ、ドラム、シーブの選択 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 96, Cranes, Subcommittee SC 3, Selection of ropes.

This second edition cancels and replaces the first edition (ISO 16625:2013), which has been technically revised.

The main changes are as follows:

• rope selection has been based on working cycles as opposed to the previous time-based concept;
• different proofs of competence for running ropes (static, fatigue, multilayer spooling) and stationary ropes (static, fatigue) have been incorporated;
• the substantial innovation of this document lies in a new mathematical approach for the proof of fatigue strength of running steel wire ropes. A new reference point has been introduced as a characteristic value for the fatigue strength, from which the S-N curves of the fatigue strength of steel wire ropes at different D/d-ratios are described;
• additional annexes have been introduced:
  • Annex A (normative) Number of relevant bending cycles;
  • Annex B (informative) Determination of the maximum tensile force in the ropes of multi-rope grabs (holding and closing);
  • Annex C (informative) Comparison of the minimum design factor according to ISO 16625:2013 and safety level according current version;