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Find this on your crane's outrigger reaction / load chart, or ask the manufacturer. It's the peak load one outrigger sees during the lift.
How this works: we convert the outrigger load in tonnes to kilonewtons (×9.81), then divide by the allowable bearing pressure to get the pad area needed to keep pressure under the ground's limit. Soft or uncontrolled ground and critical lifts must be confirmed by a geotechnical engineer.
Enter valid inputs to see the required pad size:
- Enter a maximum outrigger load greater than zero.
General guidance only. This tool gives indicative results from the numbers you enter. It is not engineering advice, a compliance assessment or a substitute for a competent person, AS 2550 requirements or your crane manufacturer's documentation. Verify anything safety-critical with a qualified professional before acting on it.
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