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Free crane hook block inspection checklist
Free crane hook block inspection checklist covering throat opening, hook twist, latch, swivel and sheave wear per AS 3777, AS 2550.1 and ASME B30.10.
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31 checks · 6 sections · Sign-off
31 checks
The fields in the printable form, in a view that fits your screen.
- Crane / Asset ID
- Hook block serial
- Make / Model
- WLL (tonnes)
- Install date
- Hours since install
- Competent person name
- Inspection date
Identification & rating
Hook throat & twist measurement
Safety latch & hook nut
Sheaves & bearings
Cheek plates, pins & lubrication
Records & disposition
Declaration & Sign-Off
I confirm that all items have been inspected/completed as indicated above. Any defects or concerns have been noted and reported.
Completed By
Printed name · Signature · Date
Reviewed / Approved By
Printed name · Signature · Date
The MapTrack crane hook block inspection checklist contains 31 checks across 6 sections.
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Key takeaways
- The MapTrack crane hook block inspection checklist contains 31 checks across 6 sections. Sections covered: Identification & rating, Hook throat & twist measurement, Safety latch & hook nut, Sheaves & bearings, Cheek plates, pins & lubrication, Records & disposition.
- Hook block identification: hook block ID, serial number, install date, hours since install, crane serial it is currently fitted to
- Capacity tag legibility: WLL stamp, manufacturer mark, certification standard and batch number all readable without doubt
- Throat opening measurement: vernier or template measurement at the throat compared against OEM nominal, with 10 percent opening as the typical discard threshold
What is a crane hook block inspection checklist?
A crane hook block inspection checklist is the component-level record used by a competent person to inspect the hook block assembly on a crane and decide whether it stays in service, goes on the watch list, or is retired and replaced. The hook block is the load-bearing assembly that sits between the wire rope reeving and the load, and the inspection covers the hook body, the safety latch, the swivel bearing, the sheave bearings, the sheave grooves, the hook nut and thread engagement, the side cheek plates, the equaliser sheave on multi-fall configurations and the capacity tag legibility. Unlike a full crane inspection that covers structure, hydraulics and controls, this checklist focuses on the hook block as a single load-path assembly. Key technical measurements include throat opening against the OEM nominal where typically a 10 percent increase against the original dimension is the discard threshold, hook twist measurement where more than 10 degrees deviation from the plane of the hook body is the discard threshold, swivel bearing freeplay, sheave bearing freeplay, sheave throat depth against the wire rope diameter and a magnetic particle or dye penetrant check on the hook body at the saddle and shank radius where fatigue cracks initiate.
AS 3777 (Lifting hooks - Safety latches and discard criteria) is the Australian standard that governs hook discard, AS 2550.1 (Cranes safe use - General requirements) carries the safe-use framework, and ASME B30.10 (Hooks) is the international reference most OEM manuals point to alongside the Australian standard. WHS Regulations 2011 Chapter 5 makes the hook block part of the PCBU plant inspection duty. Each crane in the AS 2550 series references AS 3777 for the hook on that crane type. The capacity tag must remain legible because a hook with an illegible capacity stamp is treated as non-compliant regardless of measurable condition. A printed checklist supports the inspector at the crane, and a digital record in MapTrack ties each inspection to the crane serial, the hook block serial, the install date and the running-hour count so the retirement decision is defensible later.
Learn more about compliance and inspections in MapTrack.
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Benefits of using this crane hook block inspection checklist
- Discard-criteria accountability: Each hook decision is signed against the competent inspector who measured throat opening and hook twist, not a generic crane signature
- AS 3777 and ASME B30.10 alignment: The checklist captures the exact discard criteria from both standards so audits and OEM warranty claims are straightforward
- Per-hook traceability: Hook blocks are inspected individually with their own ID, install date and running-hour count regardless of how often they move between cranes
- Latch function evidence: Safety latch operation is verified and signed every inspection so a missing or sticking latch never reaches a lift
- Sheave bearing trend data: Freeplay measurements over time flag bearing wear before a sheave seizes and burns through the wire rope
- Defensible retirement decisions: A hook retired in service has the inspection record, photo and measurement to support the call later under audit
- Audit-ready evidence: A stamped, dated record per hook satisfies the WHS Regulations 2011 Chapter 5 expectation for a competent-person inspection layer over operator pre-starts
What to include in a crane hook block inspection checklist
- Hook block identification: hook block ID, serial number, install date, hours since install, crane serial it is currently fitted to
- Capacity tag legibility: WLL stamp, manufacturer mark, certification standard and batch number all readable without doubt
- Throat opening measurement: vernier or template measurement at the throat compared against OEM nominal, with 10 percent opening as the typical discard threshold
- Hook twist measurement: twist gauged from the plane of the hook body, with 10 degrees as the typical discard threshold per AS 3777
- Hook body crack inspection: visual on the saddle and shank radius, with MPI or dye penetrant on any suspect zone, no surface weld repair attempted
- Hook nut and thread engagement: thread engagement check, locking device condition, retainer pin or split pin in place and not deformed
- Safety latch function: latch springs back fully into the throat, no sticking, no missing fasteners, latch not bent or distorted
- Swivel bearing: rotation under load is smooth, no excessive freeplay, grease nipple servicing current, seal condition acceptable
- Sheave bearings and grooves: each sheave freeplay measured, groove gauge check against the wire rope diameter, throat depth measured against discard criteria
- Equaliser sheave: on multi-fall blocks, equaliser sheave bearing and groove inspected and freeplay measured
- Side cheek plates and pins: side plate condition, retainer pin engagement, no bowing or cracking of the cheek plates
- Lubrication condition: grease nipple servicing current on swivel, sheaves and pins, with no dry zones evident
- Painted surfaces and corrosion: paint condition and corrosion under any chips, with surface rust acceptable but pitting on critical surfaces flagged
- End-of-life decision: keep in service, watch list with shorter interval, or retire and replace now
How to use this crane hook block inspection checklist
1. Plan the inspection and isolate the crane
pull the hook block log including ID, install date and running hours, confirm the inspection scope, isolate the crane and lower the hook block to a safe inspection bench at waist height with the wire rope under controlled light tension
2. Identify the hook block and confirm capacity tag
confirm hook block ID, serial number, install date, hours since install, and that the WLL stamp, manufacturer mark and certification standard are legible on the capacity tag, photograph the tag for the record
3. Measure throat opening and hook twist
use vernier or the OEM throat gauge to measure the throat opening across the inside of the hook, compare against OEM nominal and the 10 percent opening discard threshold, gauge hook twist against the plane of the body for the 10 degree discard threshold per AS 3777
4. Inspect the hook body for cracks
visually inspect the saddle, shank and bowl radius of the hook for fatigue cracking, apply dye penetrant or magnetic particle inspection to any suspect zone, photograph any indication and flag for replacement, do not attempt surface weld repair
5. Check hook nut, latch and swivel
confirm thread engagement on the hook nut, locking device or retainer pin in place and not deformed, latch springs fully into the throat with no sticking or missing fasteners, swivel rotates smoothly under controlled load with no excessive freeplay
6. Inspect sheave bearings and grooves
lift each sheave and measure bearing freeplay, gauge the sheave groove against the wire rope diameter, measure the sheave throat depth against the OEM discard criteria, on multi-fall blocks complete the same checks on the equaliser sheave
7. Walk the side plates and cheeks
inspect the side cheek plates for bowing, cracking or impact damage, confirm retainer pin engagement, check pin condition for galling or wear, verify lubrication points serviced through every nipple
8. Function-test the hook block under controlled load
reeve the rope correctly, confirm sheave rotation under light load, confirm the swivel turns freely under the load, verify the latch holds against a light contact force from a sling
9. Make the end-of-life decision and record
mark the hook block as fit for service, watch list with a shorter inspection interval, or retire and replace now, photograph any discard-criteria finding, sign the hook block record and update install or retirement date and the hook-block history file, in MapTrack the inspection attaches to the hook block ID and the crane and the next inspection is scheduled automatically
How often should you complete this inspection checklist?
AS 3777, AS 2550.1 and ASME B30.10 set the inspection cadence the hook block inspector should follow. The crane operator runs a visual pre-start hook check each shift, looking for obvious damage, missing or sticking latch and capacity tag legibility. A monthly visual inspection by a trained technician covers the assembly in place, including latch function, capacity tag legibility, swivel rotation and obvious deformation. A quarterly inspection by a competent person covers measured throat opening, hook twist, sheave bearing freeplay and a function test under light load. A 12 monthly major hook block inspection sits inside the annual crane major inspection and adds MPI or dye penetrant on the hook body saddle and shank radius. Any shock load, dropped object, impact, chemical exposure or near-miss triggers an out-of-cycle inspection of the hook block before the crane returns to service. In MapTrack the hook block inspection schedule sits against the hook block ID rather than the crane, so a hook block swap between cranes resets the clock automatically.
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Frequently asked questions
Practical answers about the form, record keeping and using MapTrack.
AS 3777 (Lifting hooks - Safety latches and discard criteria) is the Australian standard for crane hook safety latches and discard criteria. ASME B30.10 (Hooks) is the international reference that most OEM manuals also point to, and the criteria are broadly aligned with AS 3777 for throat opening and hook twist thresholds. AS 2550.1 (Cranes safe use) references AS 3777 for the hook on each crane type covered by the AS 2550 series. WHS Regulations 2011 Chapter 5 makes hook block condition part of the PCBU plant inspection duty.
Link to this answerAS 3777 and ASME B30.10 require a hook to be retired when the throat opening has increased by 10 percent or more from the original OEM nominal dimension. The measurement is taken across the inside of the hook throat using vernier callipers or the OEM throat gauge. Hook throat opening is the earliest visible indication that the hook has been overloaded or has accumulated fatigue. A throat opening at or beyond the 10 percent threshold means immediate retirement with no surface weld repair permitted to bring the hook back into service.
Link to this answerAS 3777 sets the hook twist discard threshold at 10 degrees measured from the plane of the hook body. The measurement is taken with the hook hung free and gauged against a reference plane through the shank centreline. Hook twist is an indication of side-loading or shock-loading damage that has yielded the hook material. A hook with twist at or beyond 10 degrees is retired immediately. No straightening, heat-treatment or surface weld repair is permitted to bring the hook back into service. The hook is replaced with a new certified hook of the same WLL and the change is recorded against the hook block.
Link to this answerA visual pre-start check at every shift by the operator covers latch function and obvious damage. A monthly visual inspection by a trained technician covers the assembly in place. A quarterly inspection by a competent person measures throat opening, hook twist and sheave freeplay. A full annual major inspection adds MPI or dye penetrant on the hook body saddle and shank radius and sits inside the annual crane major inspection. Any shock load, dropped object, impact, chemical exposure or near-miss event triggers an out-of-cycle inspection before the crane returns to service.
Link to this answerA crane hook at or beyond a discard threshold for throat opening, hook twist or crack indication is retired and replaced. Surface weld repair is not permitted on a hook body under AS 3777 because heat affects the parent material in ways that cannot be guaranteed by visual inspection. The safety latch and the retainer pin can be replaced as components with OEM equivalent parts where the hook body itself remains within criteria. The sheaves, sheave bearings and swivel bearing in the hook block can be replaced as routine consumables.
Link to this answerYes. This crane hook block inspection checklist is completely free to download and use - open the HTML file in any browser and use Print then Save as PDF. No MapTrack account is required. It suits competent persons inspecting hook blocks against AS 3777 across mobile, tower and overhead cranes. If you later want to move off paper and spreadsheets, MapTrack turns this into a live digital inspection: throat-opening and hook-twist measurements recorded against each hook block ID, the schedule tied to the hook block so a swap between cranes resets the clock, MPI and dye-penetrant findings stored with photos, and automated reminders for the monthly, quarterly and annual tiers with a complete timestamped audit trail. Start free at maptrack.com/free-trial or book a demo.
Link to this answerApplicable regulatory standards
This form is a starting point. Check the current requirements that apply to your equipment, work and location. The form alone does not establish compliance.
- AS 3777 (Lifting hooks - Safety latches and discard criteria)
- AS 2550.1 (Cranes safe use - General requirements)
- ASME B30.10 (Hooks)
- WHS Regulations 2011 Chapter 5
- Safe Work Australia Code of Practice 2018: Managing Risks of Plant in the Workplace
- Model Code of Practice: Managing risks of plant in the workplace (Safe Work Australia)
- Model WHS Regulations (Safe Work Australia)
- AS 2550 series, Cranes, hoists and winches, safe use (Standards Australia listing)
MapTrack publishes this template. The linked authorities publish their own guidance; they haven't endorsed this form.
The numbers behind this crane hook block inspection checklist
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The MapTrack crane hook block inspection checklist contains 31 checks across 6 sections.
- Short attribution
- MapTrack Crane Hook Block Inspection Checklist, https://www.maptrack.com/templates/crane-hook-block-inspection-checklist
- Reference list
- MapTrack. (2026). Crane Hook Block Inspection Checklist [Checklist template]. Retrieved from https://www.maptrack.com/templates/crane-hook-block-inspection-checklist
Free to reuse with credit under a Creative Commons Attribution 4.0 licence. If you’d rather link straight to it, the page is https://www.maptrack.com/templates/crane-hook-block-inspection-checklist.
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<div style="max-width:480px;font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;border:1px solid #E5E7EB;border-radius:12px;padding:20px;background:#ffffff;">
<p style="font-size:12px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;color:#071D49;margin:0;">Free template</p>
<p style="font-size:18px;font-weight:700;color:#071D49;margin:6px 0 0;">Crane Hook Block Inspection Checklist</p>
<ul style="margin:12px 0 0;padding-left:18px;color:#374151;font-size:14px;line-height:1.6;">
<li style="margin:4px 0;">Hook block identification: hook block ID, serial number, install date, hours since install, crane serial it is currently fitted to</li>
<li style="margin:4px 0;">Capacity tag legibility: WLL stamp, manufacturer mark, certification standard and batch number all readable without doubt</li>
<li style="margin:4px 0;">Throat opening measurement: vernier or template measurement at the throat compared against OEM nominal, with 10 percent opening as the typical discard threshold</li>
<li style="margin:4px 0;">Hook twist measurement: twist gauged from the plane of the hook body, with 10 degrees as the typical discard threshold per AS 3777</li>
<li style="margin:4px 0;">Hook body crack inspection: visual on the saddle and shank radius, with MPI or dye penetrant on any suspect zone, no surface weld repair attempted</li>
<li style="margin:4px 0;">Hook nut and thread engagement: thread engagement check, locking device condition, retainer pin or split pin in place and not deformed</li>
</ul>
<p style="font-size:13px;color:#6B7280;margin:14px 0 0;padding-top:12px;border-top:1px solid #E5E7EB;">Free <a href="https://www.maptrack.com/templates/crane-hook-block-inspection-checklist" style="color:#071D49;font-weight:600;text-decoration:none;">Crane Hook Block Inspection Checklist</a> by MapTrack</p>
</div>Free to reuse, including commercially. This template is published under a Creative Commons Attribution 4.0 licence. Copy it, adapt it, put it on your own site or in your own docs. All we ask is that you credit MapTrack with a link back to this page. The snippet above already includes that credit, so if you use it as-is you’re covered.
About the author
Commercial Director
Jarrod has spent over a decade in technology consulting and asset management, including roles at Accenture (mining and heavy industry) and CGI as an Asset Management Consultant. He joined MapTrack in 2018 and has spent the past 8+ years building and scaling the platform, conducting 300+ user research sessions with field teams to shape the product. His consulting background gives him deep insight into the operational and compliance challenges facing asset-intensive Australian businesses.
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