Rented Truck Crane Compliance Verification
A 40-ton truck crane arrives at a refinery for a three-day shutdown. The contractor's paperwork includes a monthly inspection dated last week and an annual comprehensive inspection dated 26 months ago. The operator's certification card is valid. In the cab, the load moment indicator displays 'calibration due' and the anti-two-block warning is bypassed with a jumper wire. The load chart is for a 95-ft boom, but the crane is configured with a 110-ft boom. One outrigger float is missing, and two nylon slings in the rigging box have no inspection tags. The contractor says a third-party inspector looked at the crane last week, but no report is available. The crane is needed for a 2,000-lb pick at a 15-ft radius. You are the site crane inspector.
1. List the deficiencies and classify each as a condition that prevents any lift, a condition that must be corrected before the specific lift, or a documentation issue. Explain.
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Conditions preventing any lift: the LMI is out of calibration and the anti-two-block device is bypassed. These are safety devices; a jumper defeat is not acceptable. The load chart does not match the 110-ft boom, so the crane's capacity is unknown. The missing outrigger float affects stability and load distribution. The annual comprehensive inspection is 26 months old, 14 months overdue, so the crane lacks current periodic inspection. Untagged slings should be removed from service until inspected and tagged. The valid operator card and a verbal 'third-party looked at it' do not cure these defects. The 2,000-lb pick is not exempt because the hazards are device, chart, and stability related.
2. Can the 2,000-lb pick at 15 ft be made as a 'light pick'? Justify your answer.
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No. A light pick still requires a functioning LMI, anti-two-block, correct load chart, and complete outrigger support. Two-blocking can occur regardless of load weight, and an uncalibrated LMI can give wrong radius or boom-angle data. The missing float can cause a sudden outrigger penetration or tipping event. The crane should be tagged out and not used until the devices are repaired or calibrated, the correct chart is installed, the float is replaced, and the annual inspection is completed.
3. What must happen before the crane is returned to service, and what records should be retained?
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Before return to service: remove the jumper, repair or replace the anti-two-block system, and have the LMI repaired and calibrated by a qualified technician; install the correct 110-ft boom load chart; replace the outrigger float; inspect and tag the slings or remove them; and perform the overdue annual comprehensive inspection. A qualified person should verify the repairs, and the operator should perform a pre-use inspection. Retain the annual inspection report, LMI calibration certificate, load chart identification, repair records, sling inspection records, and the tag-out/return-to-service authorization.