ISO 10972-1:2025

Overview

ISO 10972-1:2025 - Cranes - Requirements for mechanisms - Part 1: General establishes general design and selection requirements for crane mechanisms and related components as defined in the ISO 4306 series. This second edition provides up‑to‑date guidance on layout, component selection and system arrangements for cranes (hoists, travel, slewing and related drives). It is a design‑level standard intended to help manufacturers, designers and safety professionals ensure safe, reliable crane mechanisms. Note: this part does not include proof‑of‑competence calculations for limit states (yield strength, fatigue, wear).

Key Topics

The standard addresses practical technical requirements across core crane mechanism systems:

• Design criteria and general layout - principles for arrangement and integration of mechanisms.
• Power transmission components - selection and installation of motors, couplings, clutches and gear drives.
• Braking systems - requirements for in‑service, out‑of‑service and emergency braking; specific notes for hoist, travel and slewing brakes.
• Hydraulic and pneumatic systems - reservoir, filtration and installation requirements consistent with ISO 4413/4414.
• Rope and chain drives - drums, sheaves, ropes and chains, including guidance updated in line with ISO 16625 and chain standards.
• Gears, shafts and bearings - strength, enclosure and support considerations linked to gear calculation references (ISO 6336 series, ISO 10300).
• Load lifting attachments - hooks and attachments requirements (aligned with EN/ISO lifting attachment standards).
• Out‑of‑service and high‑risk applications - special provisions, including additional requirements for transporting molten metal or similar hazardous materials (Clause 5).

Applications

Who uses ISO 10972-1:2025 and how:

• Crane designers and manufacturers - to define mechanism layouts, select gears/ropes/chains, specify brakes and powertrain items.
• Safety and compliance engineers - to align designs with international best practice for crane mechanisms.
• Inspection and maintenance teams - to understand required component characteristics and serviceability expectations.
• Specifiers and purchasers - to write procurement requirements for crane mechanisms and ensure interoperability and safety.
  Practical uses include component selection, design reviews, risk mitigation for high‑risk lifts, and as a reference during product development and conformity assessment.

Related Standards

ISO 10972-1:2025 is part of the ISO 10972 series and references a number of related standards, including: ISO 4306 (vocabulary), ISO 16625 (wire ropes, drums, sheaves), ISO 6336 (gear calculations), ISO 4413/4414 (hydraulic/pneumatic systems), and ISO standards for hooks, chains and proof of competence (e.g., ISO 17440). These cross‑references help integrate mechanism requirements with load, control and structural design practice.