Crane‑suspended personnel platforms sit at the sharp end of your lifting program. When they fail, people get hurt first and everything else comes second. Regulators know that, which is why man baskets attract far more scrutiny than material platforms or generic below‑the‑hook gear.
From an engineering point of view, a man basket is a purpose‑designed personnel device with defined load cases, proof‑load requirements, and inspection rules. It is not a modified pallet cage. If you want to defend your use of these platforms after an incident, you need a clear story about how they were designed, load tested, certified, and inspected.
What load testing is actually proving
A proof‑load test doesn’t “make” a platform strong. It checks that the real, welded steel behaves the way the design says it should. For that to mean anything, you first need a design basis that covers:
- Rated personnel and gear load
- How that load travels from floor and rails into the frame and lifting lugs
- Reasonable dynamic effects from crane motion and occupant movement
If the only information you have is a capacity stamped on a plate, a load test still shows something, but you don’t really know what margin you have. When you have drawings and calculations, the proof‑load connects those numbers to a real, inspected structure.
What a proof‑load test usually looks like
Procedures vary by standard and company, but most man basket proof‑load tests follow the same basic steps.
First, you inspect the platform before you ever hang weight on it. You confirm the ID, check welds, corners, floors, and gates, and set up the intended rigging.
Then you apply a test load above the rated capacity. The exact percentage depends on your rules, but the point is to overload the platform in a controlled way. You arrange the test load to resemble real use, not as a perfectly centered point that tells you nothing about how corners and frames behave.
With the load in place, you lift and hold. You watch for odd deflection, twisting, popping sounds, or anything that suggests distress. After the hold, you lower, strip the weights, and look again—especially at lugs, welded joints, and floor supports—for any permanent change.
The outcome you want is simple: at the specified overload, the basket stayed elastic and came back to where it started.
What to watch during testing
A proof test is a good chance to see how the platform really carries load, not just whether it breaks. Pay close attention to:
- Lift lugs and nearby welds for cracking or distortion
- Corners and joints for racking or misalignment
- Floor plates for dish, buckling, or weld distress under concentrated loads
- Rails and gates for alignment and function after the test
If a platform twists, stays out of square, or shows obvious distress, the test did its job: it told you this design or build is not what you want working under people.
What “certified” should mean for a man basket
“Certified” is often used loosely. For personnel platforms, it should map to specific documents you can hand to an auditor. At a minimum, you should have:
- A data plate with manufacturer, serial number, rated capacity, year, and personnel‑use indication
- Drawings that show main dimensions, lift point locations, basic framing, and materials for critical members
- Proof‑load test records with date, load, configuration, and result
- Welding and QA records consistent with a below‑the‑hook personnel device
Many owners also ask for an engineer’s letter or design summary that states, in plain terms, that the basket was designed as a personnel platform to a specific standard or set of criteria.
Commissioning a new personnel platform
Before a new man basket enters service, you should check that what arrived in your yard matches your paperwork and your job.
That means verifying markings and plates, checking for shipping damage, confirming that gates, latches, and rails work as intended, and making sure the platform matches your cranes, rigging, and fall protection setup. Some owners also run a controlled, non‑proof pick in real site conditions to confirm fit and procedures before the first live job.
This is the right time to assign an asset ID, add the basket to your lifting equipment register, and attach it to an inspection schedule.
Daily and periodic inspections
Once a personnel platform is in use, inspection is what keeps its actual condition close to the assumptions in the original design.
You need two levels at least.
Pre‑use inspections are quick but deliberate checks before a shift or lift. You look for cracks, dents, bent posts, loose fasteners, damaged gates, obvious corrosion, and any rigging damage. If something looks wrong, the basket is out of service until someone qualified clears it.
Periodic inspections are slower and more thorough. They happen on a schedule based on use and environment. You get closer to welds at lugs, corners, and floor joints. You check for corrosion, coating failure, hidden cracks, or distortion. You may use simple gauges or straightedges to see if frames are drifting out of square.
The important part is that these inspections are recorded, and that you have clear criteria for when to pull a basket from service.
Repairs, changes, and when to re‑test
People will want to “fix” man baskets in the field. Some repairs are fine. Others quietly break the design.
You need simple rules:
- Structural cracks, bent frames, damaged lugs, or distorted floors get evaluated and repaired by qualified welders under some level of engineering control.
- Any change to lift points, structural members, or floor systems is treated as a modification, not a minor repair.
- Major repairs or changes usually justify a fresh proof‑load test before the basket goes back into service.
If someone starts adding padeyes, cutting rails, or welding on stiffeners without drawings or review, you no longer know what the basket can safely do.
How this ties into your lifting and safety program
Load testing and inspections should sit inside your broader lifting rules, not next to them. That means:
- Personnel lifts have their own planning and permit process, and those plans refer to specific, identified baskets.
- Operator and rigger training includes how these baskets are designed to work, not just how to hook them up.
- Confined space and rescue plans point to real platforms with real documentation, not just “use a basket if needed.”
- Audits and client reviews can trace each platform from design and test through inspections and repairs.
When you treat man baskets as the engineered devices they are, you can show that your controls on the highest‑consequence lifts are at least as strong as your controls on everything else.
Questions to ask before you buy a “tested and certified” man basket
A short conversation with a supplier will tell you whether you’re buying engineering or just paint.
Ask:
- What standard or design basis did you use?
- Can you show drawings for this model?
- How do you proof‑load test, and can I see a sample certificate?
- What inspection and maintenance instructions do you provide?
- How do you document repairs and changes over the life of a platform?
Clear, specific answers and real documents are a good sign. Vague assurances are not.
FAQs: load testing, certification, and inspection of crane personnel platforms
Q1. Why do crane personnel platforms need proof‑load testing?
Proof‑load testing shows that a personnel platform can take a defined overload without permanent damage, confirming that the real structure matches the design assumptions under load.
Q2. What documentation should come with a certified crane man basket?
You should get a data plate, drawings, proof‑load test records, and inspection and maintenance guidance that tie the stated capacity back to an actual design and test history.
Q3. How often should crane personnel platforms be inspected?
They should get a quick visual check before use and a deeper inspection on a regular schedule, with clear rules for when damage or wear is bad enough to pull the basket from service.
Q4. Do repairs or modifications require re‑testing a personnel platform?
Major structural repairs or any changes to lift points, frames, or floors should trigger engineering review and will often justify a new proof‑load test before you use the basket again.
Q5. How does load testing fit into our overall lifting safety program?
Load testing, certification, and inspection for personnel platforms should tie into your lift planning, training, and audit practices so you can show a complete approach to managing the risks of lifting people with cranes.