Select and specify
Establish construction, diameter, grade, core, lay, minimum breaking force, reeving, drum and sheave compatibility.
For maintenance engineers and crane buyers
Crane Wire Rope Guide
Select the right rope, inspect its condition and make a documented replacement decision using the appropriate guide or preliminary tool.
Quick answer
Crane wire rope decisions should combine correct selection, routine inspection, discard criteria, diameter checks, corrosion review, broken-wire assessment and internal inspection when needed. Replacement should be based on condition and applicable standards, not only calendar age.
Decision path
Choose the task in front of you
Inspect and record
Check visible defects, measure diameter, examine terminations and high-wear zones, and retain comparable records.
Decide and act
Compare findings with applicable criteria, rope history and competent-person judgement; retain, monitor or replace.
Selection and procurement
Specify a compatible rope before comparing price
A rope is not defined by diameter alone. Confirm the crane and hoist manufacturer's requirements, reeving arrangement, rope construction, grade, core, lay direction, minimum breaking force, end terminations, operating environment and compatibility with the drum and sheaves.
Wire-rope sizing calculator
Run a preliminary breaking-load and safety-factor check. It does not replace manufacturer selection or design verification.
Wire-rope buying checklist
Compare construction, grade, certificate data, lubrication, drum/sheave fit, terminations, traceability and supplier scope.
Inspection and discard decisions
Open the focused guide for the condition observed
Complete inspection guide
Begin here for inspection scope, rejection conditions, high-risk zones, records and the relationship to ISO 4309.
ISO 4309 discard criteria
Understand how rope construction, broken-wire location, reference length and other deterioration affect assessment.
Broken wires
Assess distribution, clustering, breaks near terminations and why a single universal wire-count limit is unsafe.
Diameter measurement
Measure across strand crowns, use consistent locations and compare trends with the new-rope baseline.
Corrosion and lubrication
Recognize external and possible internal corrosion, loss of metallic area, dry rope and lubricant contamination.
Kinking and birdcaging
Identify permanent deformation, strand displacement, crushing, waviness and likely rope-system causes.
NDT / MRT inspection
Learn when magnetic rope testing adds value for internal flaws or loss of metallic area that visual checks may miss.
Replacement period
Replace by condition and applicable criteria, not an arbitrary calendar interval; account for duty and environment.
Field triage
What an observation should trigger
| Observation | Immediate response | Next evidence |
|---|---|---|
| Broken or clustered wires | Restrict use if condition may be unsafe and arrange competent assessment. | Location, number, reference length, rope construction and applicable discard criteria. |
| Kink, birdcage, crushed or displaced strands | Do not straighten and return to service without assessment. | Inspect fleet angle, drum winding, sheaves, shock loading and installation history. |
| Diameter loss or flattened section | Measure consistently at multiple points and compare with baseline. | Wear, core deterioration, crushing, corrosion and manufacturer limits. |
| Corrosion or suspected internal damage | Clean only as permitted, inspect closely and consider specialist examination. | Environment, lubrication history, MRT findings and loss of metallic area. |
| No visible damage but high consequence or uncertain history | Increase evidence rather than assuming appearance equals condition. | Records, operating cycles, competent examination and NDT/MRT where justified. |
Safety boundary: This hub supports procurement and maintenance planning. It does not provide a universal discard limit or certify a rope as safe. Use the rope and crane manufacturer's instructions, the applicable edition of relevant standards, site procedures and a competent person's assessment.
Supplier category
Find the right type of wire-rope support
Separate supply, inspection and installation capability when shortlisting. A seller of rope is not automatically qualified to inspect a crane rope system or install and commission the replacement.
Rope suppliersAsk for construction, grade, core, lay, minimum breaking force, certificate, traceability and cut-length details.
Inspection providersConfirm competence, method, report format, equipment, calibration and whether MRT is available when justified.
Crane service providersConfirm reeving, termination, tensioning, drum/sheave inspection, commissioning checks and disposal scope.