Crane Inspection Checklist for Contractors: What to Check Before a Hired Crane Starts Work

A hired crane arrives with a driver, a few documents and a deadline. The easiest moment to find a problem is before the first lift, when stopping costs a delay, not an accident. This checklist is for contractors and site managers who direct lifts with hired cranes. It does not replace your client's site rules, the manufacturer's manual or the applicable local regulations, and it is not a substitute for a competent inspector. It gives you a structure so that nothing important is skipped.

Who checks what

Responsibility is shared. The vendor supplies a machine in safe working condition, with current documents and a competent operator. You direct the lift: you plan it, prepare the ground, provide the rigging and signalling arrangements where agreed, and decide whether the paperwork and the machine are good enough to start. Put the split in writing in the hire agreement.

Step 1: documents before the crane leaves the yard

Ask for these in advance and read them, rather than collecting them at the gate:

1. Inspection certificate for the crane, current on the dates of hire, from a competent person or body acceptable to your client.
2. Load chart for the exact boom and counterweight configuration the vendor will send, and its radius and capacity table in the cab.
3. Maintenance and repair record, including recent major repairs.
4. Operator evidence: competence for this type of crane, and familiarisation with this machine.
5. Rigger and signaller evidence, if the vendor supplies them.
6. Insurance details covering the machine and third-party liability.
7. Lifting accessories: slings, shackles, spreader beams and hook blocks, each with their certificates and identification marks.

Reject missing or out-of-date documents until they are replaced. A crane without a valid inspection record is not ready for work.

Step 2: walk-around on arrival

Walk the machine with the operator, with the engine off first, and look at:

• Structure: boom sections, lattice members or pins, cracks, dents, weld repairs, missing guards.
• Hydraulics: leaks at hoses, cylinders and joints, and cylinder rods that are scored or rusted.
• Wire ropes: broken wires, kinks, flattened sections, corrosion, and the condition of rope at the drum and the sheaves.
• Hook and block: a working safety latch, a free-turning hook, no cracks or spread throat.
• Outriggers and tracks or tyres: full extension and locking, pads, tyre condition and pressure.
• Safety devices: the load-moment indicator or limiter, anti-two-block protection, warning alarms and lights. Test them; do not accept "it is on".
• Cab: controls labelled and working, a legible load chart, a clear view, a fire extinguisher.
• Fluids and fuel: levels, and signs of oil in the wrong places.

Step 3: the crew and the plan

A sound machine can still fail with a poor plan. Before the first lift check that:

• there is a written lift plan for any non-routine lift, giving the load weight (including rigging), the radius, the crane configuration and the sequence;
• the operator, rigger and signaller know the plan and the communication method (radios or hand signals);
• one person has authority to stop the lift and everyone knows it;
• the load is correctly rigged and the weight is known, not guessed.

Step 4: ground and set-up

Poor ground is a common cause of delayed lifts and, worse, of crane instability. Verify:

• ground bearing capacity under the outriggers, with mats large enough to spread the load;
• the crane level after set-up, with outriggers extended as the chart requires;
• underground services, voids, trenches and slopes near the outriggers;
• overhead lines and structures and the safe distances your site sets;
• an exclusion zone under and around the load, and the swing radius of the counterweight;
• the wind limit for the lift, and who is monitoring the wind.

During the hire

• The operator completes a daily pre-use check and records defects.
• Keep a defects log and send anything on a safety device or a load-bearing part to the vendor in writing.
• Stop work if conditions change: weather, ground movement, new obstructions or a changed load.
• Keep copies of inspection certificates and lift plans on site.

Questions to ask the vendor before you book

• Which crane will you send, how old is it, how many hours has it worked, and can I see its last inspection?
• Which boom and counterweight configuration does your quote assume?
• Who is the operator, and have they worked this model and this kind of lift before?
• If the crane breaks down, how fast can you replace it, and who bears the cost of the lost days?
• Who supplies the rigger, the signaller and the lifting accessories?
• Which documents will arrive with the crane, and in what form does our client need them?

Records to keep

Keep a simple file for every hired crane: the inspection certificate, the load chart, the lift plans, the daily check sheets, the defects log, and the dates and times the crane was on site. If a dispute about standby, downtime or a defect comes up later, these records settle it. They also show your client, in an audit or after an incident, that you checked before you lifted.

Red flags and what to do

When to bring in an independent inspector

An independent inspection service is worth the cost for critical or heavy lifts, for older machines, when documents are missing, or when your client requires third-party verification. If your own crew needs to strengthen its competence, see the operator training programmes.

For planning and pricing a hire, read our guide to the cost of renting a 50-ton mobile crane. To find a crane, browse mobile cranes for rent or send one request for quote and ask vendors to attach the documents listed above.