Overview
ISO 8792:1986 - "Wire rope slings - Safety criteria and inspection procedures for use" provides safety guidance and inspection rules for the regular use of wire rope slings. It focuses on fitness-for-service, routine visual checks, and thorough examinations to detect damage or deterioration that could affect sling safety. The standard complements specification and testing standards (see ISO 7531) and notes that applicable national regulations take precedence.
Key topics and requirements
- Scope: Applies to regular use and inspection procedures for wire sling ropes; does not replace testing/specification requirements in ISO 7531.
- Slinging methods: Summarizes common approved methods (endless, single-leg, two-leg - basket, choke, direct attachment, double-wrap, etc.). Illustrations cover multi-leg configurations.
- Pre-lift checks:
- Confirm load is suitable for lifting and lifting points/attachments are adequate.
- Assess load mass (Annex B) using volume×density or a dynamometer where necessary.
- Select a sling with an appropriate Working Load Limit (WLL) and ensure leg angles do not exceed rated values.
- Avoid sharp corners, use packing pieces or thimbles, and do not use hand-splices where rotation is likely.
- Use taglines/control ropes when required and ensure personnel clear the load.
- Operational precautions:
- Do not ride on loads, drag slings on the floor, leave suspended loads unattended, or expose slings unnecessarily to corrosives.
- If environmental temperature exceeds 100°C, consult the manufacturer.
- Inspection regime:
- Pre-use: Visual inspection for broken wires, kinks, distortion, wear, heat damage, corrosion, and damaged fittings.
- Thorough examination: Carried out by a competent person at intervals not exceeding six months (shorter if service conditions or regulations require). Keep records per national rules.
- Discard criteria:
- Random broken wires: if visible broken wires in a length of six rope diameters exceed 5% of the wire count → withdraw for examination.
- Localized breaks: three or more broken wires closely grouped → discard.
- Wear: measured diameter reduced to less than 90% of nominal → discard.
- Distortion (kinking, crushing, core collapse), heat damage, severe corrosion, and damaged ferrules/fittings → withdraw or discard.
Applications and users
ISO 8792 is practical for:
- Crane operators, riggers and slingers
- Lifting equipment inspectors and maintenance teams
- Safety managers and site supervisors
- Asset managers and industrial plant operators
It supports safe lifting operations in construction, shipyards, manufacturing, logistics and heavy industry by defining inspection, pre-lift checks, and discard criteria.
Related standards
- ISO 7531 - Wire rope slings for general purposes: characteristics and specifications (testing and design requirements).
- National lifting regulations and codes - where applicable, these take precedence over ISO 8792.
Keywords: ISO 8792, wire rope slings, sling inspection, safety criteria, inspection procedures, working load limit, load stability, broken wires, sling discard criteria.