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Wire rope discard calculator

Pick a standard, enter your rope details and the worst findings from your own inspection, and the calculator applies that standard’s discard criteria.

Result bands

OK below 50% Monitor 50 to 74% Approaching 75 to 99% Discard 100% or more

How findings are combined

ISO 4309 Annex G adds findings at the same position together, and the calculator does the same for CSA Z150 and CSA Z248. Those two standards remove a rope at any one criterion, so this is on the safe side. ASME B30.30 and API RP 2D use the worst single finding.

The rope or crane manufacturer's criteria take precedence where they are stricter. The calculator does not replace an inspection by a competent person.

Email me this assessment

Get this result in your inbox with the rope details and findings you entered, ready for your inspection file. A crane rope specialist looks it over and tells you if anything stands out. Free.

Case study: What a crane rope inspection report should include

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Crane Rope Solutions  ·  Dean McDonald
9253 Smith Place, Langley, BC V1M 2R8, Canada  ·  604-813-9473  ·  dean@craneropesolutions.com  ·  About us
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All specifications must be verified before purchase and before installation. Rope specifications can change between machines of the same model and between model years. Confirm against your machine's logbook, reeving and the manufacturer's documentation before ordering. Inspection and discard decisions remain those of your competent person.