Every crane in Australia is heading toward the same appointment: the major inspection required by AS 2550.1 at the end of its design working period. It is the most consequential — and most expensive — inspection event in a crane's life, and the owners who handle it well are the ones who saw it coming years out.
What triggers a major inspection
AS 2550.1 (Cranes, hoists and winches — Safe use — General requirements) requires a major inspection when the crane reaches the end of its design working period (DWP) — the service life the crane was designed for under its assumed duty cycle, derived from its AS 1418 design classification.
For many cranes this works out to roughly 10 years for mechanical components and 25 years for structural elements, which is why the industry shorthand is "the 10-year inspection." But the shorthand hides the real rule: a crane that has worked harder than its design duty consumes its DWP early, and one that has led an easy life may have margin left. That's established by a design life assessment — a competent person reviews the crane's history, usage records, and duty against its design classification to determine how much working period remains.
The practical consequence: if you don't have usage records, assessors assume conservatively. Logging crane utilisation isn't bureaucracy — it's literally banked service life.
What a major inspection involves
This is not a big annual inspection. A compliant major inspection is closer to a planned rebuild with engineering oversight:
- Strip-down of the crane to allow examination of components that are never accessible during routine or periodic inspections — gearboxes opened, pins drawn, slew rings examined.
- Non-destructive testing of critical welds and structural elements (MPI, ultrasonic, dye penetrant as appropriate to the detail).
- Assessment against the design, typically involving a professional engineer experienced in crane design: what is worn, what is cracked, what is obsolete, what must be replaced to deliver a further working period.
- Replacement or refurbishment of life-expired components — brakes, ropes, hook blocks, hydraulic hoses, electrical systems as found.
- Documentation: the scope, findings, NDT reports, replaced components, the engineering sign-off, and the new working period granted. WorkSafe Victoria's guidance note on major inspection of cranes, hoists and winches sets out what regulators expect this record to demonstrate.
The output is not just a sticker — it's a documented engineering basis for the crane's next period of service. Our major inspection record template provides the documentation skeleton.
What it costs — and the real decision
Australian crane service providers publicly quote major inspections from around $10,000 for simpler cranes to $100,000+ for large, complex, or neglected units. The spread is driven by strip-down labour, NDT scope, what the strip-down finds, parts availability for older cranes, and the downtime while it happens.
Which is why end-of-DWP is really a commercial fork:
| Option | When it tends to win |
|---|---|
| Major inspection | The crane is structurally sound, parts are available, and the cost delivers a meaningful further working period at a fraction of replacement |
| Retire / replace | The estimate approaches replacement cost, components are obsolete, or the duty has outgrown the crane anyway |
The mistake is making that decision mid-strip-down. Commission the design life assessment 12–24 months before the DWP expires, get a scoped estimate, and decide with the crane still earning.
Note on the wider AS 2550 family
AS 2550.1 carries the general safe-use and inspection regime; the parts beneath it carry equipment-specific requirements — AS 2550.3:2025 for bridge, gantry and jib cranes (a fresh 2025 revision), AS 2550.5 for mobile cranes, AS 2550.10:2025 for elevating work platforms, AS 2550.11:2016 for vehicle-loading cranes. If you operate across these families, the routine and periodic regimes differ even though the major-inspection logic is shared.
Where Core fits
For inspection businesses, major inspections are a forecasting product as much as a compliance event: knowing which of your customers' cranes hit end-of-DWP in the next 24 months is a pipeline report. Core tracks commissioning dates, usage, and inspection history per asset, so that report is a filter, not a research project — and the major inspection itself is documented against the asset for the next 25 years. Book a demo to see the register behind it.
Sources
- WorkSafe Victoria — Major inspection of cranes, hoists and winches (guidance note)
- Standards Australia — AS 2550.10:2025 spotlight (current EWP revision)
- AS 2550.1 — Cranes, hoists and winches: Safe use — General requirements (Standards Australia)
- Service-provider cost guidance: published ranges from Australian crane major-inspection specialists (e.g. Cranetec's 10/25-year compliance service)
Frequently asked questions
Is the 10-year major inspection compulsory for every crane?
The trigger under AS 2550.1 is the end of the crane's design working period (DWP), not a flat calendar rule. For many cranes the DWP works out around 10 years for mechanical components and 25 years for structural elements — which is why "the 10-year inspection" became shorthand — but the actual point depends on the crane's design standard, duty classification, and how hard it has worked.
What is a design working period (DWP)?
The DWP is the period of service the crane was designed to deliver under its assumed duty cycle, derived from its design classification under AS 1418. Working a crane harder than its assumed duty consumes the DWP faster; a design life assessment by a competent person establishes how much remains.
What does a major inspection cost?
Service providers in Australia publicly quote ranges from around $10,000 for simpler cranes to $100,000 or more for large or complex units, driven by strip-down labour, NDT scope, component replacement, and downtime. The honest answer is that cost follows scope — which is why the engineering assessment comes first.
Who can perform a major inspection?
AS 2550.1 expects the work to be carried out under the control of a competent person, with the assessment and sign-off typically involving a professional engineer experienced in crane design. State regulators (e.g. WorkSafe Victoria) publish guidance on what they expect the documentation to demonstrate.
Major inspection or replace the crane?
At end of DWP the owner has a genuine commercial decision: a major inspection extends service life for a defined further period, but on older cranes the cost can approach replacement territory once obsolete components and downtime are counted. Get the design life assessment and a firm inspection scope before deciding — not after the strip-down starts.