Make sure the chart belongs to the installed crane
A load chart relates capacity to defined geometry and setup. Start by matching its model, revision, units and options to the crane being offered. A similar-looking crane or a maximum-tonnage headline is not a substitute for that identification.
List each representative load with its pickup and placement radius. Use the manufacturer’s definition of radius and the relevant boom and outrigger configuration. The distance can change during the lift, so a single convenient position cannot describe the whole case.
Read the configuration and deductions with the capacity
Apply the chart’s stated hook, attachment and accessory rules. Do not invent deductions, transfer capacity from another setup, or extend a chart beyond the manufacturer’s method. A case outside the permitted range calls for another crane or site method.
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| Decision | What to establish | Condition or limit |
|---|---|---|
| Chart identity | Match model, revision, units and installed options. | A chart from a similar crane is not controlling. |
| Working radius | Use the horizontal radius defined by the manufacturer. | Load distance changes during a lift. |
| Configuration | Select boom, extension and outrigger condition. | Capacity from another setup cannot be transferred. |
| Deductions and limits | Apply hook, attachment and other stated chart rules. | Do not invent or omit deductions. |
Add every suspended item before reading the chart
Count the lifting accessories in the suspended load. Use the chart for the actual radius and boom configuration, with the stated lift sector and outrigger setup.
The lift is within the chart only if the exact setup row or diagram permits at least 1,780 kg and all stated conditions are satisfied.
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| Step | Calculation or condition | Result |
|---|---|---|
| Gross lifted load | 1,600 + 180 | 1,780 kg |
| Chart lookup | Chart capacity at 6 m and actual setup ≥ 1,780 kg | Must pass |
| Configuration check | Boom, sector, outriggers, level and installed options match chart | Must pass |
- Cargo: 1,600 kg
- Hook, slings and lifting accessories: 180 kg
- Required working radius: 6 m in the defined sector
Hypothetical values only. A qualified lift plan and the crane manufacturer instructions control actual operation.
Remote control is not overload protection
A remote handset changes where the operator controls the crane. It does not, by itself, establish load-moment limiting, stability monitoring or protection against every unsafe movement. Ask the supplier to identify the installed safety functions and their relationship to the charted setup, including any outrigger-position inputs.
Include the handset, receiver, emergency-stop function and relevant interlocks in the agreed inspection scope. Use the manufacturer’s test method. Do not demonstrate protection by deliberately exceeding an unknown rating or defeating a device.
Keep the chart, installation and site assumptions together
Request the approved chart and manual for the installed equipment, and record the configuration used for the purchasing comparison. Ground and installation conditions still need to support the proposed lift. If identity, radius, deductions or setup cannot be established, the chart review remains incomplete.
Information to prepare for this review
- Exact crane model and configuration
- Load including lifting accessories as required by the manufacturer
- Pickup and placement radius
- Required boom length, height and articulation
- Outrigger and setup condition
- Manufacturer chart notes, deductions and restrictions
Records to request and keep
- Exact manufacturer load chart and revision
- Representative lift schedule
- Installed crane and outrigger configuration
- Documented chart coverage review and open exceptions
Common mistakes and what to check instead
- Using maximum crane tonnage at every radius: Read the exact chart cell or manufacturer method for the condition.
- Using boom length as working radius: Follow the chart definitions and lift geometry.
- Ignoring attachment or rigging deductions: Apply every stated chart and manual requirement.
Scope of this guide
This guide is not a lift plan and does not reproduce a manufacturer chart.
Only the exact approved chart and manual control operation.
Do not lift when chart identity, radius, configuration, deductions or setup cannot be confirmed.
Sources and applicability
Controls the project-input, quotation, approval and inspection workflow described in this guide.
Provides public checklists and worksheets; the signed project documents remain controlling.
Defines the relevant product family and published configuration boundaries. Project-specific ratings require the selected OEM documents.
Official U.S. reference supporting configuration-specific load charts, stability factors, inspection identity and removal of hazardous deficiencies. Local rules may differ.